Before departure, the LORD told Moses and Aaron:

’This month shall be unto you the beginning of months; it shall be the first month of the year to you. (Exodus 12:2)

הַחֹדֶשׁ הַזֶּה לָכֶם רֹאשׁ חֳדָשִׁים – רִאשׁוֹן הוּא לָכֶם לְחָדְשֵׁי הַשָּׁנָה. (שמות י"ב, ב)

If spring’s Nisan is first, why not call its opening “New Year”? Why no special mention, offerings, or prohibition of work?

We must examine the Torah’s calendar and foundations.

Two parallel calendars reflect different renewals, national-historical and agricultural-natural:

  1. The historical-national calendar begins in spring, Nisan, when Israel left Egypt. Its designation as first commemorates departure. The spring equinox occurs then, day and night equal before days lengthen.
  2. The agricultural calendar begins six months later in autumn, with sowing at Tishri’s end. Midmonth ingathering closes the previous year: “and the feast of ingathering, at the end of the year, when thou gatherest in thy labours out of the field” (Exodus 23:16). The autumn equinox marks transition from summer to winter, with shortening days and longer nights.

Fascinating parallels appear: midmonth in each first month has a seven-day festival associated with the exodus, unleavened bread in spring and booths in autumn.

The tenth likewise matters: the national calendar requires selecting the paschal lamb then; the agricultural calendar’s seventh month’s tenth is Atonement, annually purifying the Tabernacle. Both are preparatory days, for Passover or the new autumn year.

Neither calendar begins its year on the month’s first day. Spring gives it no festival; agricultural ingathering explicitly falls “at the end of the year.” Thus the seventh month’s first, “a memorial proclaimed with the blast of horns” (Leviticus 23:24) or “a day of blowing the horn” (Numbers 29:1), cannot be “New Year.”

The reason is profound: biblical years follow the sun and seasons, hence “the month of Abib” (Deuteronomy 16:1), the spring month. Equinox periods mark seasonal transitions and each calendar’s beginning. Months, however, follow the moon; solar and lunar cycles do not match, so equinox periods cannot synchronize with a fixed first or other monthly day.

The Torah therefore has New Year as a period rather than a date: Nisan in the historical spring calendar, Tishri in the agricultural calendar, closing and reopening the agricultural cycle with sowing.