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Pentecost - Wikipedia

The Christian High Holy Day of Pentecost is celebrated on the 50th day (the seventh Sunday) from Easter Sunday. It commemorates the descent of the Holy Spirit upon the Apostles and other followers of Jesus Christ while they were in Jerusalem celebrating the Feast of Weeks, as described in the Acts of the Apostles (Acts 2:1–31).. The holiday is also called "White Sunday" or "Whitsunday" or ...