Tu BiShv’at is the 15th day of the Jewish month of Sh’vat. It usually falls in the month of January or February on the Julian calendar. It is “the New Year of trees” or the “birthday” of fruit-bearing trees, a Jewish Arbor Day which coincides with modern notions of ecological conservation. According to the Midrash, G_d lead Adam around the Garden of Eden and told him to look at His works and to see how wonderful they were. G_d told the first man He had created all of it for him. The Most High also warned Adam not to defile the Garden, saying if he did, no one would come after him to repair the damage.
Tu BiSh’vat was an agricultural holiday in olden times, helping Jewish farmers to plan the harvest more accurately. In the late 19th century Zionists began to return to the Land of Israel and Tu BiSh’vat became a celebration of tree-planting in an effort to make the ancient land bloom again.