Counting of the Omer is a ritual in Judaism. It consists of a verbal counting of each of the 49 days between the holidays of Passover and Shavuot. The period of 49 days is known as the "omer period" or simply as "the omer" or "sefirah".
Omer Calendar
Modern barley field
Modern-day wheat sheaves
1826 Omer calendar-book from Verona (Italy), in the collection of the Jewish Museum of Switzerland
Passover, also called Pesach, is a major Jewish holiday for Rabbinical Judaism, Karaite Judaism, and Samaritanism, one of the Three Pilgrimage Festivals, that celebrates the Exodus of the Israelites from slavery in Biblical Egypt.
A table set up for a Passover Seder
Illustration of The Exodus from Egypt, 1907
Burning chametz on the morning before Passover begins
The former President of Israel Reuven Rivlin sells the leaven of the Beit HaNassi (the official residence of the president), to Shlomo Amar, the Sephardic Chief Rabbi of Israel and the Rishon LeZion, in order that Amar will later sell it to a non-Jew.