The Jewish holiday of Shavuot starts tonight.
It's the celebration of the giving of the Torah.
In the Diaspora it runs from tonight until Thursday night and in Israel it's a one-day deal from tonight to Wednesday night.
We read the Book of Ruth and eat lots of dairy products, cheese cake and such. There are all-night Torah learning sessions as well.
Read all about it.
Thus, blogging will be sporadic for the next couple of days.