Lag BaOmer is a Jewish religious holiday celebrated on the 33rd day of the Counting of the Omer, which occurs on the 18th day of the Hebrew month of Iyar. According to kabbalistic tradition, this day marks the hillula of Rabbi Shimon bar Yochai, and the day on which he revealed the deepest secrets of kabbalah in the form of the Zohar, a landmark text of Jewish mysticism. This association has spawned several well-known customs and practices on Lag BaOmer, including the lighting of bonfires, pilgrimages to the tomb of Bar Yochai in the northern Israeli town of Meron, and various customs at the tomb itself. Residents who live near Meron are permitted to travel on the specified routes, only by presenting an identity card indicating their place of residence. Guests who have ordered guest rooms have to check with the hosts that they have forwarded their latest details to the Israel Police.