AGAIN THIS YEAR: Hundreds of thousands flock to Galilee mountain for Lag B’Omer festival. Huge crowds defy state rabbinate’s delay of holiday to celebrate the ancient sage Rabbi Shimon Bar Yohai near his tomb on Mount Meron (Times of Israel). I hadn't heard about the decision to delay the celebration by one day (so that people wouldn't be traveling on the Sabbath to get to the celebrations). It sounds as though that did not go over very well.
Background here and links.