Many Muslims in the United States celebrate Eid al-Fitr (also known as Id al-Fitr or Eid ul-Fitr) on the first day of Shawwal in the Islamic calendar. It marks the end of the month-long fast of Ramadan and the start of a feast that lasts up to three days in some countries. May 24-27, 2020.  Rosh Chodesh, Sivan 1-3 2020; Month Three for three days.

In three days on Thursday, Sivan 6 the Jew and believers are celebrating Shavuot known as Feast of Weeks…and Pentecost..giving of Holy Spirit.
— Read on www.timeanddate.com/holidays/us/eid-al-fitr