Shavuot for the year 2021 starts on Monday, May 17th ending the two day holiday at sundown on Tuesday, May 18. Because the Jewish calendar is a lunar calendar, the holiday begins on the sunset of the previous day on the evening of Sunday, May 16th.
Shavuot in Israel with the Hebrew calendar falls on Sivan 6-7 each year, but have a different date each year on the Gregorian calendar. Shavuot is a two day festival. The festival marks the wheat harvest in Israel and commemorates the day God gave the Torah to Israel on Mount Sinai.
Days to the start of Shavuot 2021
Monday, May 17th is day number 137 of the 2021 calendar year with 1 year, 6 months, 4 days until Shavuot 2021.