Tonight and tomorrow (Wednesday), the Jewish world is celebrating the biblical new year of the trees, Tu be’ Shevat. The name simply stands for the 15th day in the month of Shevat.
There are two main customs on Tu be’Shevat:
1. Planting new trees in the Land of Israel.
2. Especially Jewish religious households are holding a special Seder tonight. Similar to the Pessach Seder but with a huge variety of fruit.