Reply To: Why do we CELEBRATE Lag Be'Omer? Home › Forums › Yom Tov › Sefira › Why do we CELEBRATE Lag Be'Omer? › Reply To: Why do we CELEBRATE Lag Be'Omer? May 11, 2012 2:54 pm at 2:54 pm #874972 Sam2Participant Baal: I’m not sure if that’s true. We weren’t saying Tachanun on Lag Ba’omer long before they had Hilulas.