"Tu" (the Hebrew abbreviation of 15th) in the month of Shvat was set (Hillel's opinion generally overrules Shammai's) as the beginning of the tithable year for tree fruit: Calculating the tithe on fruit starts again for fruit that sets after that date.
Here is the quintessential Jewish question: How do we emulate God? We are told that we were created by God. We are told that we have a divine spark within us.
"15th of Shevat;" New Year of the Trees; Jewish Arbor Day, which is a minor festival.
I love Tu BiShvat’s low-key preparation: no sermons, no sukkah, and no kitchen turned upside down. Quick trips for food and wine, and I’m all set.
Tu BiShvat is an opportunity to celebrate the earth and to recommit ourselves, for another year, to environmental action.