The traditional date celebrated as the Virgin Mary’s birthday in Christianity is September 8.

Basic answer

  • Most Catholic and Orthodox Christians celebrate the Nativity of the Blessed Virgin Mary on September 8 each year.
  • This feast is placed exactly nine months after the Solemnity of the Immaculate Conception on December 8, as a symbolic way of marking her conception and birth.
  • The exact historical date of Mary’s birth is not known from Scripture; the date is a liturgical tradition rather than a verified historical birthday.

A bit more context

  • The Church keeps liturgical “birthdays” only for Jesus, John the Baptist, and Mary, because tradition holds they were holy from the start of their lives.
  • The September 8 celebration for Mary has been observed in both Eastern and Western churches for many centuries, even though earlier Christians used a variety of dates.

Forum and “latest news” angle

  • Around early September each year, Christian forums and blogs often share reflections, prayers, and catechetical resources for “Mama Mary’s birthday” or the Nativity of Mary on September 8.
  • Recent online videos and articles from 2023–2024 again highlight September 8 as Mary’s birthday feast and encourage the faithful to mark the day with prayer, Mass, or even simple family celebrations like baking a cake.

TL;DR: The Virgin Mary’s birthday is liturgically celebrated on September 8, nine months after December 8, though the exact historical date is unknown.

Information gathered from public forums or data available on the internet and portrayed here.