Today is the 7th and last day of Pesach.
We remember how on that day Moses led the newly-forming Jewish People out of Egypt through the split waters of the sea.
"And Moses stretched out his hand over the sea; and the LORD caused the sea to go back by a strong east wind all the night, and made the sea dry land, and the waters were divided" -- וַיִּבָּקְעוּ, הַמָּיִם
- Exodus 14:21
"When God split the Red Sea, all the waters in the world divided, even the waters in cisterns and ditches, in jars, cups, casks and bowls ... the supernal waters, too, divided ..."
-- (Midrash Mechilta)
Whichever holiday you are celebrating today, have a happy and meaningful one!