The nickname for Tu Bish'vat is the New Year for Trees. It is the 15th day of Shevat. In Hebrew, the word is טוּ בִּשְׁבָט. Tu is the number 15. It separates the seasons (years) for tithing. The holiday has taken on an environmental significance over the past few decades. Alternative transliterations: * Tu B'Shevat * Tu Bishvat * Tu'Bishvat The Hebrew word for tree is עֵץ (atz). The 15th of Shevat is on * January 22, 2008 (Jewish Year 5768) * February 9, 2009 (Jewish Year 5769) * January 30, 2010 (Jewish Year 5770) * January 20, 2011 (Jewish Year 5771)