Because the mourning period is now over or suspended for the day, Lag Ba’omer is a popular date for weddings (which are not held during most of Sefirat Ha’omer) and haircuts.* Some have the custom not to cut a boy's hair until he is three years old, the age at which the child first begins to learn Torah. Since haircuts are delayed until after the period of mourning, and because there is Kabbalistic significance to hair, many put off the hair-cutting ceremony, called an Upsherin, until Lag Ba'omer.

Lag Ba’omer is also the anniversary of the death of Rabbi Shimon Bar Yochai, the famed Talmudic Kabbalist whose teachings are revealed in the Zohar. In Israel, tens of thousands of people travel to Mount Meron (near Safed) to observe his yahrtzeit near the cave in which he was buried. As per his deathbed request, his death is celebrated rather than mourned.