The next upcoming Lag BaOmer starts on sundown of May 15 ending at sundown on Friday May 16, 2025.
Celebration\ Observance
Many on this day will take a pilgrimage to the town of Meron in northern Israel to the tomb of Bar Yochai. Others will celebrate the holiday by lighting of bonfires. Worldwide practicing Jews will hold parties, dance, listen to music and get haircuts on this day.
History
Too many this day relates back to when a plague ended after killing Rabbi Akiva (Rabbi Yochai mentor) and thousands of his students.