How should we mourn our temple, and for how long? Part 1 Part 2

Should we be saying 'rahem' or 'nahem' on tisha b'av? Interestingly, this is one of the few cases where the Rif quotes the Yerushalmi......

Question: My father has his birthday on 10th of Av (Friday this year) and I wanted to make a barbecue for him. Is it permissible to eat...