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The blue sentences indicate additional and detailed biblical explanations. Just click on the blue hyperlink. The biblical articles are mainly written in four languages:

English, French, Spanish, Portuguese

1 - THE PLANETARY JUBILEE

2 - Biblical date of the creation of the first man Adam

Autumn 4026 BCE

3 - Detailed biblical explanations of the calculation

of the date 4026 BCE

 (simplified as much as possible)

4 - THE GREAT TRIBULATION WILL TAKE PLACE

IN A HOLY YEAR

5 - THE GREAT TRIBULATION WILL TAKE PLACE

IN A LUNISOLAR YEAR

6 -  "It will happen in summer and in winter" (Zechariah 14:8)

 

"But as these things start to occur, stand up straight and lift up your heads, because your deliverance is getting near"

(Luke 21:28)

THE PLANETARY JUBILEE

From the creation of man to his release

4026 BCE to 2023 CE

"But as these things start to occur, stand up straight and lift up your heads, because your deliverance is getting near" (Luke 21:28)

The Ethanim, 10 (Tishri) of the Great Tribulation, must correspond to a jubilee year. "But as these things start to occur, stand up straight and lift up your heads, because your deliverance is getting near" (Luke 21:28) (THE RELEASE). By the word "deliverance", Jesus Christ implied that the Day of Jehovah, the Great Tribulation, the Ethanim, 10 (Tishri), will correspond to a release, the Jubilee, proclaimed precisely the tenth day, of the seventh month (of the biblical calendar, Ethanim): "You will then sound the horn loudly in the seventh month, on the tenth of the month; on the Day of Atonement, you should cause the sound of the horn to be heard in all your land. You must sanctify the 50th year and proclaim liberty in the land to all its inhabitants. It will become a Jubilee for you, and each of you will return to his property and each of you should return to his family" (Leviticus 25:9,10). The Ethanim, 10 (Tishri) 2023, corresponds to the beginning of the year 6050, of the existence of the mankind on earth, according to the Bible.

 2 - Biblical date of the creation

of the first man Adam 

Autumn 4026 BCE, year 1 of mankind

The number of complete years that have passed are cardinal numbers (6000 YEARS). The dates of the years of the events, are ordinal numbers. The year 1 (or the first year) of Adam’s existence began at the time of his creation, in the autumn of 4026 BCE. Adding 6000 from the beginning of the year 4026 (in autumn), we reach in autumn 1974 (CE), which also corresponds to the beginning of the year 6000 (ordinal number) of the existence of mankind.

Regarding, the end of this system of things, Jesus Christ said: "But as these things start to occur, stand up straight and lift up your heads, because your deliverance is getting near" (Luke 21:28). By the word "deliverance", Jesus Christ implied that the Day of Jehovah, the Great Tribulation, the Ethanim, 10 (Tishri), will correspond to a release, the Jubilee, proclaimed precisely the tenth day, of the seventh month (of the biblical calendar, Ethanim): "You will then sound the horn loudly in the seventh month, on the tenth of the month; on the Day of Atonement, you should cause the sound of the horn to be heard in all your land. You must sanctify the 50th year and proclaim liberty in the land to all its inhabitants. It will become a Jubilee for you, and each of you will return to his property and each of you should return to his family" (Leviticus 25:9,10). The apostle Paul wrote, under inspiration, about the Law given to Moses: it has a prophetic value: "For since the Law has a shadow of the good things to come, but not the very substance of the things" (Hebrews 10:1). "Those things are a shadow of the things to come, but the reality belongs to the Christ" (Colossians 2:17) (REALITY OF THE LAW).

Therefore, the Day of Jehovah, Ethanim, 10 (Tishri) (Revelation 11:19), must correspond to a Jubilee year, the beginning of a fiftieth year. A fiftieth year of what? The most logical, given that it is the release of humanity, it can only be connected to the date of the creation of man: 4026 BCE: "For the creation was subjected to futility, not by its own will, but through the one who subjected it, on the basis of hope that the creation itself will also be set free from enslavement to corruption and have the glorious freedom of the children of God" (Romans 8:20,21). The Apostle Paul, under inspiration, shows that the end of this system of things will correspond to a liberation of humanity from the law of sin and corruption. It will be the planetary fulfillment of the Jubilee, of the release proclaimed in Israel, at the end of the seven sabbaths of years ((7x7) 49 full years), and at the beginning of the fiftieth year (Leviticus 25:9,10).

This is where the usefulness of calculating the date of the creation of the man Adam, 4026 BC, is revealed: The year corresponding to the great tribulation must be a jubilee, that is to say: it must correspond to the beginning of a fiftieth year, starting in Ethanim, 10 (Tishri). What is this Jubilee Year? The important date: Autumn of the year 4026 (BCE (before common era)) the year 1, of the existence of man, by adding 6000, the result is the date of autumn 1974, the moment of the beginning of the year 6000 (ordinal number) of the existence of humankind (Autumn 1975, being the end of the 6000 full years (cardinal number)). By adding 49 (7x7) full years, to the autumn of 1974, we arrive in the fall of 2023 (The end of the year 6049). The Ethanim, 10 (Tishri) 2023, corresponds to the beginning of the year 6050, of the existence of the mankind on earth, according to the Bible.

Regarding the beginning of the year 6050, why do we add the 49 years, in autumn of 1974 CE, rather than in the year 1975 CE, mentioned in the table above?

To understand the "mathematics" of biblical chronology, it is necessary to distinguish between "ordinal" numbers and "cardinal" numbers. The calendar years are expressed in ordinal numbers: If a person says, "I am 20 years old." "20" is a cardinal number, 20 full years. If the same person says: "We are in 2020". This number designating the year "2020" of the calendar, it is ordinal. This means, on January 1, 2020, 2019 full years (cardinal number), have passed since the beginning of our era.

As for the creation of Adam, in the beginning of mankind, the reasoning is the same. In the autumn of 4026, God created the first man (Genesis 2:7). When did the year 1, of humanity begin (ordinal number)? The very day of Adam's creation: Autumn 4026 BCE. When Adam was 1 year old (cardinal number), after his first birthday, the second year of mankind (ordinal number) began: Autumn 4025 BCE. When did the year 6000 (ordinal number) of humanity begin? At the beginning of the 6000th year, in the autumn of 1974 CE (4026 + 1974) (ordinal number). The autumn of 1975 corresponds to the full 6000 years of humanity (cardinal number).

The jubilee year began, at the beginning of the 50th year (ordinal number), after 49 full years (7x7 sabbaths of years) (cardinal number). Therefore, to obtain the beginning of the year 6050 (ordinal number), we must add 49 complete years (cardinal number), to the date of autumn 1974 CE (ordinal), and we arrive at the autumn (the 10 Ethanim (Tishri)), 2023 CE (ordinal). Autumn 2023 CE, will be the beginning of the jubilee, the fiftieth year, and autumn 2024, the end of this year.

3 - Detailed biblical explanations

(simplified as much as possible)

of the calculation of the date 4026 BCE

From 1943 B.C.E. to 1513 B.C.E. : 430 years

At Exodus 12:40, 41, Moses records that “the dwelling of the sons of Israel, who had dwelt in Egypt, was four hundred and thirty years.” From the above wording, it is apparent that not all this “dwelling” was in Egypt. This time period begins with Abraham’s crossing of the Euphrates on his way to Canaan, at which time Jehovah’s covenant with Abraham went into effect. The first 215 years of this “dwelling” was in Canaan, and then an equal period was spent in Egypt, until Israel became completely independent of all Egyptian control and dependency, in 1513 B.C.E. The New World Translation footnote on Exodus 12:40 shows that the Greek Septuagint, which is based on a Hebrew text older than the Masoretic, adds, after the word “Egypt,” the words “and in the land of Canaan.” The Samaritan Pentateuch does similarly. Galatians 3:17, which also mentions the 430 years, confirms that this period started with the validating of the Abrahamic covenant, at the time that Abraham crossed the Euphrates on his way to Canaan. This was therefore in 1943 B.C.E., when Abraham was 75 years old.—Gen. 12:4.

10 Another line of evidence supports the above reckoning: At Acts 7:6 mention is made of the seed of Abraham as being afflicted 400 years. Since Jehovah removed the affliction by Egypt in 1513 B.C.E., the beginning of affliction must have been in 1913 B.C.E. This was five years after the birth of Isaac and corresponds to Ishmael’s “poking fun” at Isaac on the occasion of his weaning.—Gen. 15:13; 21:8, 9.

From 1513 BCE to the division of the kingdom 997 BCE:

516 years (479 + 37)

From 997 B.C.E. to 607 B.C.E: 390 years

A helpful guide to the overall length of this period of the kings is found at Ezekiel 4:1-7 in the mimic siege of Jerusalem that the prophet Ezekiel carried out at God’s direction. Ezekiel was to lie on his left side for 390 days to “carry the error of the house of Israel,” and on his right side for 40 days to “carry the error of the house of Judah,” and each day was shown to stand for a year. The two periods (of 390 years and of 40 years) thus symbolized evidently stood for the length of Jehovah’s forbearance with the two kingdoms in their idolatrous course.

From the division of the kingdom in 997 B.C.E. to the fall of Jerusalem in 607 B.C.E. was 390 years. While it is true that Samaria, the capital of the northern kingdom, had already fallen to Assyria in 740 B.C.E., in Hezekiah’s sixth year (2Ki 18:9, 10), it is probable that some of the population fled into the southern kingdom before the Assyrians’ advance. (Note also the situation in Judah following the division of the kingdom as described at 2Ch 10:16, 17.) But, more important, the fact that Jehovah God continued to keep the Israelites of the exiled northern kingdom in view, the messages of his prophets continuing to include them long beyond the fall of Samaria, shows that their interests were still represented in the capital city of Jerusalem and that its fall in 607 B.C.E. was an expression of Jehovah’s judgment against not Judah alone but the nation of Israel as a whole. (Jer 3:11-22; 11:10-12, 17; Eze 9:9, 10) When the city fell, the hopes of the nation as a whole (with the exception of the few who maintained true faith) suffered collapse.—Eze 37:11-14, 21, 22.

From 607-537 BCE. to the return from exile: 70 years

The duration of this period was fixed by this decree of God himself concerning Judah: "11And all this land will be reduced to ruins and will become an object of horror, and these nations will have to serve the king of Babylon for 70 years" (Jeremiah 25:8-11).

From 537 BCE - 29 CE to the baptism of Jesus Christ:

565 years (82 + 483)

- 537 to 455 BCE : 82 years.

- 455 BCE to 29 CE: 483 years:

455 BCE, the beginning of the prophecy of Daniel, of the 70 weeks of years (Daniel 9:24-27). It began with the order to rebuild Jerusalem, in the 20th year of Artaxerxes (Long Hand), the year that Nehemiah received permission to go and rebuild Jerusalem (Nehemiah 2:1, 5-8).

455 BCE to 29 C.E.: 483 years: the year of the baptism of Messiah Jesus Christ. According to the prophecy of Daniel 9: 24-27, 7 weeks of years make 49 years. 62 weeks of years are 434 years: 434 years + 49 years = 483 years.

29 CE to 36 CE  (conversion of Corneille): 7 years. (483 + 7) end of the 490 years, of 70 weeks of years (7x70) of the prophecy of Daniel 9:24-27.

From the autumn of 29 CE to the autumn of 1975 CE: 1946 years

The autumn of 1975 CE, is the end of 6000 years of mankind existence. The beginning of the year 6000 of humankind, began in autumn of 1974 CE.

4 - THE GREAT TRIBULATION WILL TAKE PLACE

IN A HOLY YEAR

The autumn of 2023 will be the beginning of the year of the tenth plus the tenth of the tenth (of the reign of 1000 years), the year 110 of the reign of Christ, which will belong to Jehovah and Jesus Christ

According to the prophetic value of the mosaic law which will be fulfilled in reality, this year from autumn 2023 to autumn 2024, will be a holy year belonging to Jehovah and his Son high priest Jesus Christ (Hebrews 10; Colossians 2:17). It is written in Leviticus 27:21 that this jubilee year must also be a holy year, belonging both to Jehovah and to the king and high priest Jesus Christ. How will, the year (Ethanim / Tishri) 2023/2024, be holy? According to the chronological calculation of the prophecy of Daniel 4, Jesus Christ began to reign in Heavens, in autumn 1914: Thus autumn 1914 was the beginning of the first year of the heavently reign of Christ. What is the year beginning with the autumn of 2023? The reign of Christ will be 1000 years, according to the book of Revelation (Apocalypse):

“And I saw an angel coming down out of heaven with the key of the abyss and a great chain in his hand. He seized the dragon, the original serpent, who is the Devil and Satan, and bound him for 1,000 years. And he hurled him into the abyss and shut it and sealed it over him, so that he would not mislead the nations anymore until the 1,000 years were ended. After this he must be released for a little while. And I saw thrones, and those who sat on them were given authority to judge. Yes, I saw the souls of those executed for the witness they gave about Jesus and for speaking about God, and those who had not worshipped the wild beast or its image and had not received the mark on their forehead and on their hand. And they came to life and ruled as kings with the Christ for 1,000 years. (The rest of the dead did not come to life until the 1,000 years were ended.) This is the first resurrection. Happy and holy is anyone having part in the first resurrection; over these the second death has no authority, but they will be priests of God and of the Christ, and they will rule as kings with him for the 1,000 years” (Revelation 20:1-6).

In the autumn 2013, the hundredth year of the heavenly reign of Christ began (one tenth of the number of years in the 1000 years of his reign). In the autumn of 2023, the 110th year of the heavenly reign of Christ, will begin (The tenth (100), plus the "tenth of the tenth" (10) = year 110). Where in the Bible it is written that this year should belong to Jehovah and Jesus Christ? According to biblical rule, the tenth of the tenth belongs to Jehovah and to his Son high priest, Jesus Christ, this year will belong to them, or will be holy:

"You should tell the Levites, ‘You will receive from the Israelites the tenth part that I have given to you from them for your inheritance, and you should contribute from it a tenth part of the tenth part as a contribution to Jehovah. And it will be considered your contribution, as though it were the grain of the threshing floor or the full production of the winepress or oil press. In this way you will also give a contribution to Jehovah from all the tenth parts that you receive from the Israelites, and from them you are to give the contribution for Jehovah to Aaron the priest" (Numbers 18:26-28). The tenth of the tenth belongs to Jehovah, but also to Jesus Christ, the heavenly high priest.

The autumn of 2023 will be the beginning of the year of the tenth plus the tenth of the tenth (of the reign of 1000 years), the year 110 of the reign of Christ, which will belong to Jehovah and Jesus Christ (Revelation 20:1-6). Consequently, the jubilee year 2023/2024 has a double convergence (year 6050 of the existence of mankind and the year 110 of the heavenly reign of Christ). This double convergence is a double witnessing (Compare with Matthew 18:16).

5 - THE GREAT TRIBULATION WILL TAKE PLACE

IN A LUNISOLAR YEAR OF 13 BIBLICAL MONTHS

THE GREAT TRIBULATION AND THE LUNISOLAR YEAR OF 13 MONTHS

The simple cross-checking of information from the 7 months period, with the period from Tishri 10th to Nisan 10th (6 months normally), we understand that there will be the intercalary month of Veadar: The year when the Great Tribulation will take place will be a Lunisolar Year of 13 months

The Western calendars are based on the Gregorian solar calendar of 365 days (Wikipedia Gregorian calendar).
Othes countries use the lunar calendar. The lunar year has between 354 and 355 days. There is therefore a difference of about 11 days between the solar calendar (365 days) and the lunar calendar (354 days). Nevertheless, the Hebrew lunar calendar, also takes into account the solar cycle of 365 days, so it is a "lunisolar" calendar (Wikipedia Hebrew lunar calendar).
The important points to know about the biblical calendar, like the Hebrew calendar, are the following (important to understand the biblical reasoning that will follow):
In the Bible, the days begin in the evening after the sunset. For example in Genesis 1:5, regarding the first day of the symbolic “And there was evening and there was morning, a first day".
In the Bible, the months began at the "new moon" (Psalms 81:3). Lunar months are either 30 or 29 days.

Nevertheless, at this stage of the study, there is a significant difficulty regarding the biblical definition of the new moon (Wikipedia New Moon). Some think that this is the moment when the moon completely disappears (in the current Hebrew calendar). Others think that this is the first crescent of the moon. For this reason, there is a special study of the theme of the New Moon that will indicate the necessary and important choice between these two options to determine exactly a biblical date (that of the memorial to the death of Jesus Christ (Nisan 14th) and Tishri 10th) (After this article (below)).

THE LUNISOLAR YEAR

The lunar year has 12 months of 29 or 30 days. The intercalary month (Veadar) is regularly added to compensate for the difference of 11 days between the lunar year (354 days) and the solar year (365 days). In this case, this year has exceptionally 13 months, it is a “lunisolar”. In the Bible there is no direct mention of this process in order to adjust the lunisolar calendar to the solar year. Nevertheless, indirect information shows that this adjustment was made. For example, some months had to coincide regularly with seasonal crops, either spring (Abib (Nisan): spring) or autumn (Ethanim (Tishri): autumn) (Exodus 23:15). It is obvious that the Israelites of the biblical times realized this adjustment by the addition of the intercalary month (Veadar). The festivals celebrated the month in spring, remained spring, over the years. And all the autumn festivals of the month of Tishri, remained autumnal, over the years (Leviticus 23:37).

Currently the adjustment system, used by the Hebrew calendar, is made with a “metonic cycle”: 7 adjustments with 7 lunisolar years of 13 months, over a period of 19 years.

In the book of Ezekiel we can understand that the year in which the Great Tribulation will occur will be Lunisolar, with 13 months, according to the Jewish calendar. In Ezekiel chapters 38 and 39 we have the prophetic story of events before, during and after the Great Tribulation. After the Great Tribulation the prophecy gives the information of a seven-month period of cleansing the Earth: "The house of Israel will spend seven months burying them in order to cleanse the land" (Ezek. 39:12-14). How would this simple information make us understand that this would be a year of 13 months?

According to Revelation 11:19 the Great Tribulation will take place a Tishri 10th. At the end of the seven months written in Ezekiel 39: 12-14, it is written that the prophet had the vision of the Temple which represents the dominion of the Kingdom of God on earth, a certain in Nisan 10th: " In the 25th year of our exile, at the beginning of the year, on the tenth day of the month, in the 14th year after the city had fallen, on that very day the hand of Jehovah was upon me, and he took me to the city" (Ezekiel 40:1)

The simple cross-checking of information from the 7 months period, with the period from Tishri 10th to Nisan 10th (6 months normally), we understand that there will be the intercalary month of Veadar: The year when the Great Tribulation will take place will be a Lunisolar Year of 13 months.

Astronomical table of the lunar cycle of May 2019

Hebrew Calendar - Chiourim - May 2019 (written in french) (Nisan / Iyar 5779):
Two days late with the biblical system of the new moon (Psalms 81:3)

New Moon

"Blow the horn on the new moon, On the full moon, for the day of our festival"

(Psalms 81:3)

There are two definitions of the new moon:

1 - "The new moon is the first lunar phase, when the Moon and Sun have the same ecliptic longitude. At this phase, the lunar disk is not visible to the unaided eye, except when silhouetted during a solar eclipse. Daylight outshines the earthlight that dimly illuminates the dark side of the new Moon. The actual phase is usually a very thin crescent because the Moon rarely passes directly in front of the Sun, except in a solar eclipse" (Wikipedia New Moon).

2 - "The original meaning of the term new moon, which is still sometimes used in non-astronomical contexts, was the first visible crescent of the Moon, after conjunction with the Sun. This crescent Moon is briefly visible when low above the western horizon shortly after sunset and before moonset" (Wikipedia New Moon).

The first definition of the new moon, is corroborated by what is written in Psalms 81:3: "Blow the horn on the new moon, On the full moon, for the day of our festival". According to the context of this Psalm, it is the festival of booths which was celebrated from Ethanim 15th (Tishri 15) to Ethanim 22nd. It was an autumn festival, in the time of the last harvests. While the festival of unfermented cakes, was celebrated from Nisan 15 to 22, in the spring, at the beginning of the first harvests.

In Psalms 81:1 it is written: "Shout joyfully to God our strength. Shout in triumph to the God of Jacob". The festival that most symbolized the joy and exuberance, was undoubtedly the fest of booths. Regarding it, Jehovah had told Moses, for his people Israel: "Seven days you will celebrate the festival to Jehovah your God in the place that Jehovah chooses, for Jehovah your God will bless all your produce and all that you do, and you will become nothing but joyful" (Deuteronomy 16:15 (see verse 13)). The expression of Psalms 81, "Shout joyfully to God our strength", describes perfectly the feeling of joy asked by God, in Deuteronomy 16:15. The complete appearance of the "full moon", marking the middle of the lunar month, is in the poetic contrast to the "new moon", which is at this stage, invisible, and represents the start of the month.

By the way, if you look at the astronomical table of the lunar cycle, you will notice that the full moon lasts about three nights, and the new moon, its disappearance, for three nights, in general. It is also interesting to note that David, fleeing from before king Saul, associated the new moon with three days during which he could hide (1 Samuel 20: 5). Is it a simple coincidence? Not necessarily, if one thinks of the three moonless nights, the period of the "new moon", allowing him to hide safely, without being surprised in his sleep.

Regarding Psalms 81:1,3, the astronomical tables of the lunar cycles, if we go back, starting from the full moon (whether it's the Tishri, 15 or the Nisan, 15), we arrive at the beginning of the month, at the new moon, at the moment "when the Moon and Sun have the same ecliptic longitude" and therefore, it is invisible (http://pgj.pagesperso-orange.fr/calendar.htm). In the example presented in the photo (above), of the lunar cycle of May 2019: After the sunset of May, 17 to May 18, is the full moon, biblically speaking, the 15th of the month of "Iyyar" (or Ziv), of the Hebrew month. Going back fifteen days, we reach the date of Iyyar 1st (biblical month), May 3rd, 2019 (gregorian calendar), after sunset.

Nevertheless, in the current Hebrew calendar (Hebrew Calendar - Chiourim (In French)), Iyyar 1st is after the sunset of May 5th to May 6, 2019, there are two days late (See photo to the right). In this case, it is the chosen option of "the first visible crescent of the Moon" (see photo above, comparing it to the Hebrew Calendar (in Jerusalem). What option to choose? The invisible new moon or the first visible crescent?

The Biblical Tishri 10, corresponds to 22 (after sundown) / 23 September 2023, the date from the summer solstice to the autumnal equinox (early winter, according to the Bible (Zechariah 14: 8 ))

The new moon corresponding to 1 Elul, will be in the day of August 16, 2023. The 1 Elul will be August 15, after sunset, and August 16, 2023

6 - "It will happen in summer and in winter"

(Zechariah 14:8)

 

Jehovah clearly announces "His One Day" (14:7), the Great Tribulation, will take place in the day ot the change of season, from the summer solstice to the autumnal equinox (representing the beginning of winter, in the Bible), September 22nd (after the sunset) to 23rd (gregorian calendar). In many biblical quotes, it is known that the Great Tribulation will take place in Ethanim 10th (Tishri 10th), in a luni-solar year of 13 Biblical months. Regarding Zachariah 14:7,8 : The "one day" of Jehovah, the date of the great tribulation will take place : Tishri 10th = September 22/23.

Starting from these three extremely important Biblical information, it is sufficient to look first in the current Jewish calendar (Hebrew Calendar - Chiourim (written in french)), in what luni-solar year of 13 months, the Ethanim, (Tishri 10), corresponds to the September 22nd and 23rd, the date of the transition from the summer solstice to the autumnal equinox. Based on this official Jewish calendar, we must search until the year 2034, where Tishri 10th exactly corresponds from Friday, September 22 (after sunset) to Saturday, September 23, 2034.

Regarding the other biblical method based on the astronomical new moon, we get the date from Friday, September 22 (after sunset) to Saturday, September 23, 2023 (which is a luni-solar year), corresponding to the biblical Ethanim,10 (Tishri,10). How to obtain the Ethanim 1st (Tishri 1st)? We must take into account the annual alternation of lunar months given its duration of 29 days and a half (this half day must be integrated every other month): a lunar month of 30 days, followed by a month of 29 days, etc. The alternation of the beginning of the biblical year (which begins in Nisan), to the month of Tishri is the following: Nisan: 30 days , Iyyar (or Ziv): 29 days, Sivan: 30 days, Tammuz: 29 days, Ab: 30 days, Elul: 29 days and Ethanim (or Tishri) 30 days.

Nevertheless, the adaptation of the lunar calendar with the astronomical cycle is not so easy, it requires a regular adjustment. It takes place after the month of Tishri (Ethanim), until the month of Adar or Adar II (Veadar): Heshvan (Boul): 29 or 30 days; Kislev 29 or 30 days; Tebeth 29 days; Shebat: 30 days; Adar 29 or 30 days; Ve-adar (Adar II) (this month is added only in the lunisolar years, for to be adjusted to the solar cycle): 29 days. This adjustment seems to conform to the Bible because the prophecy of Ezekiel (39-40: 1) indirectly indicates that the addition of the intercalary month is between the months of Tishri and Nisan (between Adar and Nisan).

To get exactly Ethanim 1st (Tishri 1st) 2023, just start with the new moon of the previous month, Elul 1st, which, given the annual alternation, has only 29 days, which allows to obtain the Tishri 1st. The new moon corresponding to Elul 1st, will be in the day of August 16, 2023 (gregorian calendar). That means, Elul 1st will begin on August 15th, after sunset, to August 16, 2023. Adding, 29 days, in accordance with the annual alternation, the 29th of Elul will be the in September 12th (after sunset), to the 13th of September 2023.

So, Ethanim 1st (Tishri 1st), in September 13th (after sunset) to September 14th. Therefore, the Biblical Ethanim 10th (Tishri 10th), will be: Friday, September 22nd (after sunset), to Saturday, September 23rd, 2023.

Comparing this date with the Hebrew calendar Chiourim, there are two days late in this calendar: September 22/23, 2023 corresponds to Tishri 8th. It is the biblical option of the new moon (without visible crescent) that was chosen for the calculation of the date of September, 22/23 2023 (Psalms 81:3). It is on this same biblical basis of calculation that the date of the next commemoration of the death of Jesus Christ is determined on Sunday, April 5, 2020, after sunset.