Religious Jews who go to Meiron on Lag BaOmer read the Zohar, the Book of Splendor, sing songs and kindle memorial candles. They also visit the many graves of rabbis and scholars which are in the vicinity.The week in which Lag BaOmer falls is also marked by the Israel Defense Forces as Gadna (short for Gedudei Noar = Youth Corps) Week. The Gadna flag is a bow and arrow.Many theories have been raised concerning the significance of the date of Lag BaOmer. According to one of them, Bar Kokhva’s army suffered a series of defeats prior to Lag BaOmer and then, on that day, his forces won a great victory. This encouraged the people to such an extent that the date was ruled as a permanent festival day.
Another theory also associates Lag BaOmer with an event of military significance, but from an earlier period. Joseph Ben Mattityahu (Josephus Flavius) in his book “Wars of the Jews” suggests, in his description of the outbreak of the rebellion against the Romans in the year 66 CE, that a group of zealots who had planned an uprising against the oppressive Roman rule, decided to take up arms on Iyyar 18. In order not to attract the attention of the Romans, they concealed the designated date for the uprising by referring to it as Lag BaOmer. On the Eve of Lag BaOmer, fires were lit on hill tops throughout the country, thus giving the signal for the start of the rebellion. This, according to this theory, is the origin of the custom of lighting bonfires on Lag BaOmer.For whichever reason, the day acquired significance in the annals of Jewish nationalism. Even after their defeat, the Jews carefully observed Lag BaOmer to remind future generations of their desperate struggle for freedom. The new political circumstances, however, did not permit it to be celebrated publicly and so, for many years, Lag BaOmer was kept in secret. Its true origin appears to have been forgotten over the years.