Tu Bishvat (the 15th of the month of Shevat) is first mentioned in early rabbinic tradition, as a “new year” for trees – or more accurately, fruit and nut-bearing trees. In fact, according to the Mishnah, in Rosh haShanah 1:1, trees may have two separate new years. One of these is on the first of Tishrei to mark the age of the tree (that is, no matter what date a tree was planted or replanted, it becomes a year older on the first of Tishrei; this is important because according to Lev. 19:23-25 one may not eat of the fruit of a newly planted tree for four years). Read more...