Tu BiShvat (Hebrew: ט״ו בשבט‎) is a Jewish holiday occurring on the 15th day of the Hebrew month of Shevat (in 2015, Tu BiShvat begins at sunset on 3 February and ends at nightfall on 4 February). It is also called "Rosh HaShanah La'Ilanot" (Hebrew: ראש השנה לאילנות‎), literally "New Year of the Trees." In contemporary Israel, the day is celebrated as an ecological awareness day, and trees are planted in celebration. Its role is important to the concept of Chadash.