Do you know which Jewish holiday is known as the New Year for Trees?
It's called Tu B’Shevat and occurs on the 15th day of the Hebrew month Shevat. Tu is the number 15 and Shevat is the 11th month in the Hebrew calendar, which is January/February, according to Judaism 101.
The holiday is more popular today because of it's connection to the environment as the video above from PBS Religion & Ethics shows. In an article for the Jewish Journal called "Growing tradition: Tu b’Shevat," Rabbi Mike Comins traces the origins of the holiday to ancient times when people were farmers.