Or, more specifically, what is/are the reason(s) for not saying tachanun on various occasions and how does Tu b'Shvat fit in. (I'm looking for classic reasons, not 'it's got to be somebody's birthday ...
With Tu B'Shevat in 2 weeks, and the Inyan of eating fruits many people eat dried fruit. What are the concerns regarding worms in specific fruits? How do you check to make sure that there are no ...