The Omer
The Omer is a period of counting from the second night of Pesach/Passover for 50 days until the holiday of Shavuot. This is based upon the verse from Scripture: "you shall count for yourselves from the day after the festival rest, from the day you bring the Omer Sacrifice, seven full weeks shall they be. Until the day after these seven full weeks shall you count fifity days, and then you shall bring a New Offering to Me" (Leviticus 23:15-16). Although the offerings can no longer be brought without a Holy Temple, we count these days for many reasons even today.
During the Omer, there are no wedding ceremonies and many religious people don �t cut their hair or shave. This custom is in commemoration of a tragic loss of 24,000 disciples of Rabbi Akiva who perished between Pesach and Shavuot.