Your Personal Jewish Calendar Elaborates on… the Jewish Calendar.

Dear Josep,

You once asked me where you could find a Hebrew calendar to help you keep track of the holidays and stuff, since, I quote, “I have you to tell me every single holiday, but… you can’t be writing to me every day of our lives to tell me all the holidays 🙂 And, of course, to have a different calendar makes it hard to keep updated every passing year, because it never falls on the same day…” Little did you know, you would be stuck with me as your personal Jewish calendar forever. Mwahahahahaha!


Well, as I’ve said before, technology has been developing to our advantage. These days, you can have the Hebrew date displayed alongside the Gregorian date on your Google Calender really easily. (You go into Settings–>General and select “Hebrew calender” under “Alternate calendar”.) Unfortunately it does not mention the holidays, so you have to add the Jewish holidays separately. But that’s also pretty easy: you browse to your calendar, and under “Other calendars” click “Browse interesting calendars”, and then “subscribe” next to Jewish Holidays. Tada!

So hold on a second. What is the Hebrew calendar anyhow? What are we counting from? Well… tough question, because theoretically, it’s supposed to be counting from the creation of the world. That is, it’s a calculation using the Bible and the dates and years mentioned in it as a reference. But most modern Orthodox Jews don’t actually think the world–or more accurately, the history of homo sapiens, since it’s theoretically counting from the creation of Adam–is only 5775 years old. We don’t think the creation story is meant to be taken literally. The word “Torah” means “instruction”. The Torah is an instruction manual, not a history book. So I see it is being more symbolic than anything else; meant to make us reflect on the creation, rather than give a scientific calculation of when it happened. (If you’re interested in learning more about how we reconcile science with the Genesis creation story, here’s a fascinating and comprehensive article by Dr. Gerald Schroeder, a scientist and Orthodox Jew who has written extensively on the harmony between science and Judaism.)

The Hebrew calendar has 12 months and is mostly lunar but influenced by the sun as well. What that means is that the months are based on the moon, and each month begins with the new moon, but every few years we add an extra month to realign the calendar with the seasons. We do this because according to the Torah, Passover must take place in the spring. The Muslim calendar, by contrast, is only lunar, so their months and holidays fall during different seasons.

The names of the Hebrew months (Nisan, Iyar, Sivan, Tamuz, Av, Elul, Tishrei, Cheshvan, Kislev, Tevet, Shvat, Adar) are generally understood to have been adapted from the Babylonian calendar. This makes sense, because our calendar was really consolidated during the time of Ezra and Nehemiah, returning from the First Exile in Babylonia. In the Torah, the months are not referred to by names, just “the first month”, “the second month”, and so forth.

Pop quiz! Which month is the first month of the Hebrew calendar?

Trick question!

You know that Rosh Hashana is the Jewish new year, which begins with Tishrei, so you’d think that Tishrei is the first month, right? Not in the Torah: the source for the holiday of Rosh Hashana is Leviticus 23:24: “In the seventh month, on the first day of the month, shall be a solemn rest unto you, a memorial proclaimed with the blast of horns, a holy convocation.”


You see, because Jews have a penchant for complicating things, we actually have four different new years. The first of Tishrei, otherwise known as Rosh Hashana or the Jewish New Year, is the new year for years. That means that we count years from that date, so 5774 turned to 5775 on the first of Tishrei.

The first of Nisan is the new year for months. Nisan, not Tishrei, is the first month, and we count the months from there. That’s how Tishrei comes out as the seventh month. So when does Nisan fall? Usually around March-April; it’s your Hebrew birth month. 😉 The first night of Passover falls on the 15th of Nissan.

The other two new years are a little more obscure, so stay with me here.

The first of Elul is the new year for the tithing of cattle. There is a commandment to bring the firstborn of cattle to the Cohanim (priests), and the first of Elul was sort of the “fiscal year” for animals born during that year, similar to how taxes are calculated in countries where the fiscal year starts on a date other than the first of January. This new year is no longer observed, because we no longer have a Temple and the priests cannot receive these offerings. But Elul–which is the month before Tishrei–has taken on the significance of preparing for the High Holidays.

The last of the new years is the 15th of Shvat, or Tu B’Shvat (because the number 15 is written as ט”ו, tet-vav, or the numerical value of 9+6. Why don’t we write 10+5? Because then it would be yud-heh, and that spells one of the names of God. 16 is written 9+7, ט”ז, for the same reason). This new year is used for calculating the age of plants or crops for certain commandments that have to do with agriculture, or for agricultural tithing. It has become known as “the new year for trees”, and has become a minor holiday on which we celebrate trees and their fruit. It is customary to eat the new fruit of the season on this day. The Kabbalistic mystics created a sort of ceremony, a “seder” (similar to the Passover seder), during which they eat symbolic fruit and discuss its significance. It’s also evolved into the Israeli Arbor Day. A day to plant new trees and to develop environmental awareness.

And, as always, an excuse to eat delicious food.
Photo credit: Gilabrand

So. Why am I telling you all this now?

Because tonight is Rosh Chodesh Shvat; the first day of the new month of Shvat. A month I happen to be especially fond of, not only because I have a thing for trees, but also because my birthday falls on the 3rd. 🙂

Birthdays are not much of a big deal in Jewish tradition, though it is said that it’s a sign of a righteous person when s/he dies on his/her birthday. (This is said to have been true of Moses and King David.) Generally, important Jewish figures are commemorated on the day of death, not the day of birth. However, we do tend to celebrate like people in many other cultures. We’re all about giving thanks on a day that commemorates something good that happened to you, and getting born is pretty high on that list! 😉 It is said that on one’s birthday, just like on one’s wedding day, one has a particularly strong connection to God and can give particularly powerful blessings to others. (The reason for this, by the way, is that such life events bring us joy, and joy brings us closer to God.)

And, well, you’ve experienced firsthand that my blessings have a fairly good record 😉 If there’s something specific you’d like me to pray for this Friday, let me know. 😉 Either way, you know I will be (and have been) praying for you.

Chodesh Tov, many blessings, and lots of love,



Blog readers: What do you think about what seems to be a conflict between the Bible’s calculation of the history of humankind versus the scientific calculation? What meaning does that number, 5775, hold for you?

10 thoughts on “Your Personal Jewish Calendar Elaborates on… the Jewish Calendar.

  1. I know there are different theories about the biblical-scientific year count.
    But to me its kind of a non-issue.
    If scientists say and believe the world has existed for billions of years-ok.
    I am counting and using the jewish calendar out of faith and wanting to connect with my fellow jews the world over.I simply do not see or feel that there is much of a conflict…

  2. I can’t recall where in Torah it says that 1,ooo years (to us) is like 1 year to HaShem. It is possible to theorize that the 6 days of creation was actually (scientifically) 6,000 years or even 6 million years. In the book “Genesis and the Big Bang” the author goes into incredible detail about space/time distortion and perspective. And as you noted in the post, other scientists are in somewhat of an agreement. They also give us food for thought… WHAT IF Creation really was a literal 6 days? Adam and Chava were full grown adults, mountains, seas , animals and vegetation were mature or ripe! What if …carbon dating was just guess work? Something else to think about!

    1. Psalms 90:4: “One thousand years in Your sight are like a day that passes, a watch in the night.” 😉

      The article I linked to above is by the author of “Genesis and the Big Bang”. 🙂

  3. To have the Jewish holidays in your Gregorian calendar you don’t even need to use the Hebrew calendar. If you add them they are there forever, but if you want to see what the hebrew date is at other times then it’s nice

    1. True. I was very happy to discover that you can have both displayed on your Google calendar, because I am much less aware of what Hebrew date it is independent of the holidays, and that’s not cool.

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