"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.
According to traditional Jewish belief, the Sabbath has its origin in God’s divine command to observe the seventh day as a day of rest and sanctification.
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.
Tu BiShvat (Jewish Arbor Day) is the time of year when Israeli schoolchildren plant trees. Perhaps it’s no coincidence that a teacher instituted the tree-planting custom.