From sundown on Sunday, February 10 to nightfall on Monday, February 11, 1952. 15 Sh'vat 5712 · ט״ו בשבט Tu BiShvat (Hebrew: ט״ו בִּשְׁבָט, romanized: Ṭū bīŠvāṭ, lit. '15th of Shevat') is one of several New Years in the Hebrew calendar, occurring on the 15th day of the Hebrew month of Shevat. It is also called Rosh HaShanah La'Ilanot (רֹאשׁ הַשָּׁנָה לְאִילָנוֹת, 'Head [of] the Year for Trees'), since it marks the new year for fruit-bearing trees. Its original purpose in Jewish society was to distinguish one year's fruits from another in order to observe annual agricultural commandments, such as the giving of tithes. In contemporary Israel, it is celebrated as a Jewish holiday and an ecological awareness day, and trees are planted in celebration. Wiki link Dates: Hebcal.com (CC BY 4.0), Diaspora schedule. Text: Wikipedia (CC BY-SA).