Today is a holiday in Israel, kids are home with 3 days vacation. It is the holiday of Shavuot. On shavuot we eat dairy products. Our shavuot dinner was a cheese/champignons and onions pie made by hubby, which the kids love and for desert a cherry cheese cake!
The date of Shavuot is directly linked to that of Passover. The Torah mandates the seven-week Counting of the Omer, beginning on the second day of Passover and immediately followed by Shavuot. This counting of days and weeks is understood to express anticipation and desire for the Giving of the Torah. On Passover, the Jewish people were freed from their enslavement to Pharaoh; on Shavuot they were given the Torah and became a nation committed to serving God.
In the Bible, Shavuot is called the Festival of Weeks; Festival of Reaping, and Day of the First Fruits. Since Shavuot occurs 50 days after Passover, Hellenistic Jews gave it the name Pentecost (πεντηκοστή, "fiftieth day").
Why do we eat dairy products?
When the Jewish people received the Torah at Mount Sinai, included was special instructions for how to slaughter and prepare meat for eating. Until then, the Jews had not followed these laws, thus all their meat - plus the cooking pots - were now considered "not kosher." The revelation at Sinai occurred on Shabbat, when slaughter and cooking are prohibited. So the only alternative was to eat dairy, which requires no advance preparation.