In my observation, most people observe certain mourning customs between the beginning of sefirat ha'omer and lag b'omer (such as refraining from shaving, listening to live music, etc.). Some people ...
There are several different opinions about when the students of Rabbi Akiva died, and which days we mourn for them. Sefer HaToda'ah quotes the Maharil, who says that the students of Rabbi Akiva died ...
Nusach Askenaz says Baomer, Nusach Sefard and Sefardim say Laomer - Why does everyone call it Lag Baomer - why not call it Lag Laomer?