This year Shavuot falls on a Friday, meaning that Shabbat immediately follows. There will be differences in the prayers on Shabbat, between Israel and Chutz l'Aretz, but otherwise it's the same.
I have to cook and clean today.
Shavuot is a traditional learning day, day and night. More traditionally, people study Jewish texts all night. I can't handle those all-nighters any more. For the past ten years or so, we've been hosting a class in the afternoon. So I'm expecting the neighbors over to hear Rabbi Dov Berkovits, a neighbor. We don't travel on the Jewish Holidays, so everything is local.
If I don't get to post during the day,
Have a Joyful Holiday