The wheat harvest and the Giving of the Torah.
Feast of Weeks (Shavuot)
Seven weeks after the Exodus from Egypt.
Shavuot is a Jewish religious holiday.
The Shavuot celebration originated in Israel and they celebrate a feast.
rosh hashanah, yom kippur, passover, shavuot, sukkot.
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.
It is actually called Shavuot, not Shavout. Mount Sinai, in Israel is the originating location of Shavuot. It celebrates the day, or two days (outside of Israel), when God gave Torah to Moses. Because it originated in Israel, it is celebrated in one day by Jews of Israel, and in two days by Jewish people outside Israel.
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.
Yes, Shavuot is a Jewish holy day/festival (Leviticus ch.23).