To make a calendar הַחֹדֶשׁ הַזֶּה לָכֶם רֹאשׁ חֳדָשִׁים רִאשׁוֹן הוּא לָכֶם לְחׇדְשֵׁי הַשָּׁנָה
(ב) הַחֹ֧דֶשׁ הַזֶּ֛ה לָכֶ֖ם רֹ֣אשׁ חֳדָשִׁ֑ים רִאשׁ֥וֹן הוּא֙ לָכֶ֔ם לְחׇדְשֵׁ֖י הַשָּׁנָֽה׃
(2) This month shall mark for you the beginning of the months; it shall be the first of the months of the year for you.

Jackson Denber: The calendar was a good first start because it is an every day thing and the Jews didn't have one over their own when they were slaves. The calendar is a good symbol of freedom! When you are a slave, you are not free to have control over your own time.

Adam Tyberg: I think the first mitzvah should have been that all believe in the One G-d. We say the Shema multiple times a day to remind us of this. If we had that as the first mitzvah, the Jews would not have been nervous when Moses went up Mount Sinai and we might not have had the Golden Calf.

Understanding the Jewish Calendar


By Ted Falcon, David Blatner

The Jewish calendar isn’t just a tool for observing the passage of time. Judaism marks and celebrates time in a number of ways — holidays, Shabbat, the weekly readings of specific portions of the Torah, and the rituals of the personal life cycle.

Months and years in the Jewish calendar

The Jewish calendar, unlike the civil Gregorian calendar, is based both on the cycles of the moon as well as the sun — the months correspond to cycles of the moon and the years correspond to cycles of the sun. Since a lunar month has about 29-1/2 days, Jewish months always have either 29 or 30 days. The problem is that 12 lunar months is 10-1/2 days short of the 365-day solar year

In the fourth century, Rabbi Hillel II instituted a mathematical system of rectifying the lunar and solar years which is still used today: The years are divided into 19-year cycles, seven of which are leap years that have 13 months instead of 12. (The details of Hillel’s calculations are mind-bogglingly dense.)

The 12 Hebrew months are called Nisan, Iyar, Sivan, Tamuz, Av, Elul, Tishrei, Heshvan, Kislev, Tevet, Shvat, and Adar. On leap years, Adar is followed by a month called Adar 2. If your birthday falls in Adar 2, it’s celebrated in Adar on non-leap years.

The years of the Hebrew calendar are always 3,760 or 3,761 years greater than the Gregorian calendar that most people use. For example, the year 2020 will be the Hebrew years 5780 to 5781 (the discrepancy is because the Hebrew year number changes at Rosh Hashanah, in the fall, rather than on January 1). The calendar is so far ahead because the Jewish calendar is calculated from the creation of the world. Sometime between the ninth and twelfth century CE (Common Era), rabbinic scholars decided — based on tradition and biblical interpretation — that Creation happened in 3761 BC (on October 7 of that year, to be exact).

Double-day celebrations in the Jewish calendar

In the Jewish calendar, the first of the month always falls on the new moon, and the fifteenth of the month is always a full moon. However, in the ancient days, before science figured out how to predict the new moon, the declaration of a new month came from authorities in Israel (based on the reports by witnesses). But later, rabbis realized that it might take too long to get word from Israel to Jews around the world about when the months began. So a rabbinical decision was made that all holidays (except Yom Kippur) would be observed for an extra day for Jews living outside Israel, just in case the days were counted incorrectly.

Days in the Jewish calendar always begin at sunset. The holidays in the following table all begin at sundown the day before the date listed.

Rosh Chodesh: The Meaning of the New Month

by Dina Coopersmith

Like the moon, the Jewish people will rise up again and light up the night.

The first commandment the Jews were given as a people is the mitzvah of Rosh Chodesh, the New Month:

"And God said to Moses… in the land of Egypt… This month is for you, the head of the months. First it is for you among the months of the year." (Exodus 12:1-2)

The Jewish nation was told while still in Egypt that the month of Nissan, the month in which they would be leaving Egypt, should be for their first month, and that from now on, they, as a nation, have a responsibility to count the months and create a uniquely Jewish calendar based on the lunar year.

Isn't this a strange first commandment? You'd think the development of the calendar would only come after the establishment of the basic fundamentals like the Ten Commandments. Why does the Torah consider the process of establishing the new month as a major breakthrough in creating a nation? And what was wrong with the solar calendar that everyone else had been using? What is the significance of basing the Jewish calendar on the moon?

THE HUMAN ELEMENT

The mitzvah of sanctifying the new month was a rather involved process. As soon as someone saw the tiniest sliver of a new moon, they would run to the Jerusalem High Court, who needed two witnesses to testify that the moon was actually seen. They would then convene the court, declare the new month and send messengers across the land to tell everyone that the new month had begun on this certain day. They, in turn, would pass on the news and place torches on mountains and high spots to spread the news faster. Sometimes it took two weeks for people to receive confirmation of the day the court had declared as the beginning of the month. (This, by the way, is the root reason why the Jews of the Diaspora would keep two days of the holidays, just in case they were wrong about which day was Rosh Chodesh if the information didn't arrive on time.)

Our calendar determines on which day each Jewish holiday will occur. Each particular holiday brings with it a concrete spiritual reality from above that is available for us to tap into on that specific day. Passover, for instance, contains the opportunity to attain spiritual freedom; Rosh Hashana is the time for judgment.

The determination of this calendar is placed squarely in human hands. Thus if the moon were to appear, in fact, on a Monday, but no one actually saw it until Tuesday, "seeing is believing" and the court would decide that the first of the month was on a Tuesday. As a result, God, as it were, follows the decision of the court and acts accordingly, so that in the case of Rosh Hashana, He would push off His judgment of the entire world by one day!

God is giving the Jewish people an empowering message with this first commandment. Up until now, the Jews have been slaves to the Egyptians. Their time was not their own. Now, says God, you are becoming masters of your time. And not only of your own time, but of My time as well!

The Jews have been slaves to the Egyptians. Now, says God, you are becoming masters of your time and of My time as well!

By being given our own system of measuring time and creating our own calendar, we are taking charge of shaping reality. We are given a certain area of control over nature. Whereas time is steadily moving ahead, never-stopping, marching on in a cyclical, repetitive spiral, we are given the power to stop or start time at will, allowing us to "share" with God that special creativity of determining reality.

THE MOON

As part of this empowering message, it is essential for the moon to be our determining factor in setting up our calendar instead of the sun. The unique feature of the moon is that it appears to us to wax and wane, to disappear and reappear, to grow, diminish and grow again. It is also the smaller of the two luminaries.

Whereas the sun is the symbol of unchanging nature, rising in the east, setting in the west, day in and day out every day of the year, the moon changes and it seems to be telling us something: You can be small and you can diminish until you almost disappear, but then, when things look their darkest, hope springs eternal. You can start looking up again. You can change a situation and yourself for the better, no matter how bad it seems. Nothing is static or set in stone. Human beings have free will and therein is their power of renewal -- an ever-present struggle against the steady, cyclical, repetitive and predictable march of time and nature.

The solar system determines the year, in Hebrew "shana," which comes from the same root as "to repeat, to go over," whereas the moon sets the months, "Chodesh" from the Hebrew root "chadash," -- new, change, different.

The Jewish people are compared to the moon. Though they are small, and suffering has been an integral part of their history among the nations, the Jew knows never to give up. As an individual and as a nation, he will rise up again and light up the night.

Jews live with this belief in the power of miracles, that God supervises over the world and is not dependent on predictable laws of nature. The Jewish nation has a special relationship with God and even when on the lowest of spiritual rungs, about to assimilate and disappear, God maintains His constant love, as a father loves his son.

God relates to Moses a message to give to Pharaoh and to the Jewish people before the 10 Plagues begin, "My firstborn son is Israel" (Exodus 4:22). The Israelites were at their lowest point at this time, undeserving of any miracles in their own right. And yet that is exactly when God sweeps us up, taking us out of the darkness of Egypt, initiating the upward-moving process until 50 days later when we are deserving of receiving the Torah and of becoming a nation.

What a perfect time and place to give the Jewish people the encouraging message in the commandment to sanctify the new moon every month and to determine our calendar this way:

"And God said to Moses ... in the land of Egypt, say to the Jewish people: This month is for you the beginning of the months ..." (Exodus 12:1-2)

God has given us the power of renewal and change, the gift of expanding, brightening and growing big again after we have been diminished.

WOMEN AND ROSH CHODESH

For women, Rosh Chodesh, the first day of the new month, is considered a mini-holiday as a reward for not having been willing to participate in the sin of the Golden Calf.

After the giving of the Torah on Mount Sinai, Moses went up the mountain for 40 days to receive the 10 Commandments. As a result of a minor miscalculation, the Jewish men believed that Moses had died and they beseeched Aaron to make for them a "god" to go with them in the desert.

"And Aaron said: Take the earrings from your wives, sons and daughters, and bring them to me" (Exodus 32:2). The women heard and refused to give their jewelry to their husbands, but said: "You want to make a calf with no power to save? We will not listen to you." God gave them reward in this world that they keep Rosh Chodesh more than men, and in the next world they merit to renew themselves like Rosh Chodesh. (Pirkei d'Rabbi Eliezer, 45)

Why should this be our reward? What is the link between our not willing to give up our precious jewelry for the ill-fated Golden Calf project and the concept of celebrating the reappearance of the moon every month?

Women had the ability to see beyond the very frightening situation the Jewish people experienced after Moses went up to receive the Torah and tarried on his way back. As far as the Jewish men were concerned, all hope was lost. There was no leader, no shepherd, no one to guide them through the desert to Israel. How could Moses be late? He must have died! And in fact the Midrash tells us that Satan showed the Jewish people a vision of their beloved leader lying lifeless on a cot in heaven, to scare them.

When things seemed dark and hopeless, the women knew that light was just around the corner.

But the women could not be convinced to sink into such utter despair. When things seemed dark and hopeless, they knew that light was just around the corner. Patience and trust in God would be all that would be needed to get through the "bad" times and into the good ones. Like the moon, becoming brighter and bigger only after it disappears completely into darkness, they knew that better times were on the way. It was impossible to them that God would leave them stranded after having just received the Torah 40 days earlier. They were willing to believe in the power of renewal and trust God no matter how difficult things seemed.

Let us hope that the Jewish nation, especially in Israel, can take encouragement from this special gift of the lunar cycle by which we count our months. As the organized onslaught of Arab terror is well into its fourth year and solutions seem remote, it's all too easy to lose hope and despair of ever living a normal, safe life in our own country. Rosh Chodesh teaches us that everything can change. It is when a situation reaches its bleakest point that the light appears again.

Micah Sharlin: I don't think this is an odd first commandment at all because it helps people prepare for what is coming. It is like at the start of anything new, like school, you make a plan and a schedule.

Miyah Adler: I think it is a good mitzvah to have the lunisolar calendar. If we didn't have calendars, we might all have holidays at different times. It would be a real MESS~