Tu Bishvat (Hebrew: ט״ו בשבט‎) is a minor Jewish holiday in the Hebrew month of Shevat, usually sometime in late January or early February, that marks the "New Year of the Trees" (Hebrew: ראש השנה לאילנות, Rosh HaShanah La'Ilanot‎). Tu Bishvat is one of four "New Years" mentioned in the Mishnah. Customs include planting trees and eating dried fruits and nuts, especially figs, dates, raisins, carob, and almonds. In Israel, the flowering of the almond tree, which grows wild around the country, coincides with Tu Bishvat.


The name Tu Bishvat is derived from the Hebrew date of the holiday, which occurs on the 15th day of Shvat (שבט). "Tu" stands for the Hebrew numerals "tet vav" (9 and 6) which is 15. Until recent decades, it was most often called Ḥamisha Asar BiShvat (חמשה-עשר בשבט), the fifteenth, of Shvat. When representing the number using letters, rabbinic rules forbid using the letter-numerals that represent 10 (י yud, y) and 5 (ה hey, h) together because they form the abbreviation of the "ineffable name of god," YHVH יהוה. Therefore, 15 is represented by the letters (ט tet t and ו vav u) for 9 and 6=15.

Tu Bishvat appears in the Mishnah in Tractate Rosh Hashanah as one of the four new years in the Jewish calendar. The discussion of when the new year for trees occurs was a source of debate among the rabbis: "And there are four new year dates: - The first of Nisan - new year for kings and festivals - The first of Elul - new year for animal tithes. Rabbi Elazar and Rabbi Shimon say: the first of Tishrei. - The first of Tishrei- new year for calculation of the calendar, sabbatical years and jubilees, for planting and sowing - The first of Shevat - new year for trees, according to the school of Shamai; The school of Hillel say: the fifteenth of Shevat" (Rosh Hashana:)

The rabbis of the Talmud ruled in favor of Hillel on this issue. Thus the 15th of Shevat became the date for calculating when the agricultural cycle began or ended for the purpose of biblical tithes involving trees and fruit.

Of the talmudic requirements for fruit trees which used Tu Bishvat as the cut-off date in the Hebrew calendar for calculating the age of a fruit-bearing tree, Orlah remains to this day in essentially the same form it had in talmudic times and uses Tu Bishvat in the same way. In the Orthodox Jewish world, these practices are still observed today as part of Halacha, Jewish law. Orlah fruit is not considered kosher, and Tu Bishvat is still used as the cut-off date. For a tree in its final year, fruit ripening before Tu Bishvat is considered orlah, while fruit ripening on or after Tu Bishvat in the final year is permitted. Maaser Sheni and Maaser Ani are observed today by a ceremony redeeming tithing obligations with a coin. Because the form of redemption is the same for both of these latter obligations, the year of the fruit no longer matters for these tithes.

Tu Bishvat generally falls on the second full moon before Passover, or, in a leap year, the third full moon before Passover.
In the synagogue, the penitential prayer of Tachanun is omitted on Tu Bishvat (and at the afternoon service of the day before), as is the custom on minor Jewish holidays.
There are no other special recitations or blessings in the prayer service.

In the Middle Ages, Tu Bishvat was celebrated with a feast of fruits in keeping with the Mishnaic description of the holiday as a "New Year." In the 1600s, the kabbalist Rabbi Yitzchak Luria of Safed and his disciples instituted a Tu Bishvat seder in which the fruits and trees of the Land of Israel were given symbolic meaning. The main idea was that eating ten specific fruits and drinking four cups of wine in a specific order while reciting the appropriate blessings would bring human beings, and the world, closer to spiritual perfection.

In Israel, the kabbalistic Tu Bishvat seder has been revived, and is now celebrated by many Jews, religious and secular. Special haggadot have been written for this purpose.