What is it about Tu B'Shevat? There are four "Roshei Hashanah." The First of Tishrei we all know about. That is the day we blow the shofar. The First of Nissan and the First of Elul come and go in our times without much notice. But Tu B'Shevat is different. There is a sense of simcha, a sense of hope and many minhagim associated with it: we eat fruit and make a Shehecheyanu. We omit Tachanun. What is different about Tu B'Shevat? One reason for the simcha is the universal joy felt at the advent of spring, and Tu B'Shevat...