The upcoming Jewish holiday of Shavuot (the Festival of Weeks, which commences on Saturday evening) commemorates the Hebrews receiving of the Decalogue, or Ten Commandments, at Sinai some 3300 years ago. On that seminal date, a series of commandments were issued that would frame key elements of monotheistic thought, spiritual observance, and social interaction for centuries to come.
The Sinaitic experience was the culmination of a seven-week period that began with the Hebrews’ Exodus from Egypt (commemorated by Passover). That physical birth, so to speak, of the Hebraic nation was followed by its spiritual naissance at the foot of the mountain.
It is noteworthy that the seven-week period that separates Passover from Shavuot is a period of counting, known as Counting of the Omer. During these 49 days, the Torah proscribes a steady, upward count, leading up to Shavuot.