Shavuot is a Jewish religious holiday.
The Shavuot celebration originated in Israel and they celebrate a feast.
jews dont wear white on shavuot
Shavuot (mistranslated as Pentecost) was fifty days after the Passover. Still is.
No. Tefillin are not worn on holidays, including Shavuot, or on the Sabbath.
In Israel, Shavuot is 1 day. In the diaspora, it is 2 days.
No. Anything dairy is traditional on Shavuot, especially blintzes.
Prior to Shavuot, which the Christians often mislabel as Pentecost, Jews were in the Omer or Harvest Season. It is typically seen as a time of lament in Judaism and happy activities, such as weddings, haircuts, parties, and similar are not performed. After Shavuot, these activities resume.
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).