Aliya Summary: Six weeks after leaving Egypt, the Israelites arrived in the Sinai Desert and encamped at the foot of Mount Sinai. Moshe ascended the mountain where G‑d gave him a message to transmit to the people. Included in this message was G‑d’s designation of the Israelites as “His treasure out of all peoples” and a “kingdom of princes and a holy nation.”
In the third month following the Exodus, on “this” day, they arrived at the Sinai Wilderness. Why “this” day, and not “that” day? The answer is because the Torah is a living guide for our lives, to be constantly rediscovered and relived. Some say that the custom that some people follow of standing for Torah reading is based on this idea. Just as the People stood at Sinai, so too do we experience anew “the standing at Har Sinai” each time we hear the words of the Torah being read to us.