From The Real Meaning of LaG BaOmer by Rabbi Yair Hoffman
Ramah quite seriously.
A number of reasons are cited by Torah authorities for commemorating Lag BaOmer:
(Shla Psachim 525).
inner secrets of the Torah (Chayei Adam Moadim 131:11)
493)
Also,
students, the Minhag is to celebrate a little bit and not to make it
into a full-fledged holiday. The Chsam Sofer points out that our
Talmud does not mention it as a holiday at all.
So how do we commemorate this day? The Bnei Yissasschar states that
the custom is to light a number of candles in Shul on this day. We do
bad dream. We do not recite Tachanun on this day, nor the Mincha
before it. We get married and attend weddings. We join in with
singing and dancing, and we listen to music (See Pri Magadim Aishel
Avrohom 493:1).