The next upcoming Lag BaOmer starts on sundown of May 11 ending at sundown on Tuesday May 12th, 2020.
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.
Too many this day relates back to when a plague ended after killing Rabbi Akiva (Rabbi Yochai mentor) and thousands of his students.