The Seventh and Eighth days of Passover are considered a Yom Tov.
Count the Omer in the evening. Refer to March 29 listing.
What Happened on the Seventh Day of Passover? On the 15th day of the month of Nissan, the children of Israel left Egypt, where they had served as slaves for generations. Despite his original stubborn refusal, after 10 debilitating plagues, Pharaoh relented and allowed Israel to leave Egypt.
After reconsidering, the Egyptian army caught up with the Israelites at the banks of the reed sea. The Israelites were trapped; there was nowhere to go but into the sea.
Then G‑d commanded Moses to raise his staff and the sea split, allowing the Israelites to comfortably cross on dry land. When the Egyptians attempted to follow the Israelites across, the sea came crashing down on them. Chariots, riders and horses all perished in the churning sea.
Overwhelmed with gratitude, Moses led the Israelites in singing the Song of the Sea. Miriam led the women in an additional song of thanks, accompanied by tambourines and drums.
This miracle took place in the wee hours of the morning of the Seventh of Passover.