Fifty days are counted between Passover and Shavuot. Those days, which should have been days of joy and preparation for the receiving of the Torah, turned out to be days of semi-mourning. No weddings are allowed, no music and no hair-cuts. This count is called Sefirat Ha'Omer. And yet, on the 33 day of this count, the 18th day of the Hebrew month Iyar, Lag Ba'Omer is celebrated. Indeed, this is the most mysterious holiday in the Jewish tradition?