Check out the link below (from the Hebrew Wikipedia).
It is known as Shavuot in Hebrew, or the Feast of Pentecost in Christian terminology.
I am assuming it is: שבועות טוב which means literally good weeks, or in conversation generally have a good week. It might be also referring to the holiday Shavuot, which it then means Good Shavuot.
Shavuot "sha-VOO-ote" in Hebrew. The word means "Weeks", probably because of the holiday's timing: It's the only holiday in the Torah without a date of its own, defined only as commencing seven weeks after the beginning of Passover. In 2011, Shavuot begins at sunset on Tuesday, June 7.
The name for the Festival of Weeks in Greek was derivative from the Hebrew term for the holiday "Shavuot" and is pronounced "Ssabuot" (Σσαβουότ).
Shavuot is a Jewish religious holiday.
The Shavuot celebration originated in Israel and they celebrate a feast.
No. Tefillin are not worn on holidays, including Shavuot, or on the Sabbath.
Shavuot (mistranslated as Pentecost) was fifty days after the Passover. Still is.
No. Anything dairy is traditional on Shavuot, especially blintzes.
Shavuot is recognized as a festival by all branches of Judaism, Orthodox, Reform, Conserviative. However, of the three pilgrimage festivals, it is the most frequently ignored. (Despite the good food, since cheesecake is a traditioinal food for Shavuot.) I have been to Orthodox synagogues where hardly anyone showed up for Shavuot, and I have been to Reform synagogues that were crowded on Shavuot. Even so it is probable that more Orthodox Jews take Shavuot seriously.
Cabe has no meaning in Hebrew, but it might be a nickname for something else.
Yes, Shavuot is a Jewish holy day/festival (Leviticus ch.23).