We celebrate Tu B'Shevat beginning at sundown on January 24. Also known as the New Year of the Trees because it was used for calculating the age of trees for tithing. The Torah teaches that fruit from a tree may not be eaten during the first three years; the fourth year’s fruit is for G-d, and after this, the fruit can be eaten. It is customary to eat a new fruit on this holiday or to eat from the Seven Species (shivat haminim) that are abundant in Israel: wheat, barley, grapes, figs, pomegranates, olives, and dates. Some people also plant trees on this day. Tu B’Shevat began as a minor holiday marked by a festive meal and it has grown into the a modern Jewish Earth Day. It is an opportunity to celebrate our sense of environmental responsibility and Jewish tradition.