Feast of the Nativity of the Virgin
Feast of the Nativity of the Virgin is held on September 21. Orthodox Church. This event in the third decade of the month September is annual. 
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Scripture does not give an account of Mary’s birth. The Church has celebrated Mary’s birth since at least the sixth century. A September birth was chosen because the Eastern Church begins its Church year with September. Saint Augustine connects Mary’s birth with Jesus’ saving work.
This Feast day is celebrated on September 8 on the Gregorian calendar and September 21 on the Julian calendar.
Similar holidays and events, festivals and interesting facts
World Marrow Donor Day on September 20 (is celebrated globally on the third Saturday of September);
World Cleanup Day on September 20 (the third Saturday of September);
International Eat An Apple Day on September 20 (Third Saturday of Septembe);
International Coastal Cleanup Day on September 20 (Held on the third weekend of September);
International Day of University Sport on September 20
World Alzheimer's Day on September 21
World Gratitude Day on September 21 (First celebrated in 1965);
European Cooperation Day on September 21
International Day of Struggle against Monoculture Tree Plantations on September 21
World Protection Elephant Day on September 22
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World Rhino Day on September 22
International Mixed Berries Muffin Day on September 22
World Rose Day on September 22
International Mime Day on September 22