Significance: The "new year" for calculating the age of trees
Length: 1 day
Customs: eating fruit or the Seven Species; planting trees (or paying for planting them)

Tu B’Shevat, the 15th of Shevat on the Jewish calendar — celebrated this year on Wednesday, February 8, 2012 — is the day that marks the beginning of a “New Year for Trees.” This is the season in which the earliest-blooming trees in the Land of Israel emerge from their winter sleep and begin a new fruit-bearing cycle.