Today is apparently Sukkot. In case you're not jewish or are and don't know all your stupid little feast days, Sukkot is the Feast of Booths. This is in remembrance of the Israelites escape from Egypt, the booths being the temporary shelters they lived in as they passed through the desert.
But since there never was a group of people called "Israelites" that were held in captivity in Egypt and since there is not a trace of evidence that a vast number of people trekked through the desert from Egypt to the little coastline along the Mediterranean(40 years or otherwise), this religious celebration is about as meaningless as December 25 is to the birth of Christ.
Picture copied from: www.jew-jews-judaism.com