Holiday / observanceMay 21

Helena, mother of Constantine I

Christian feast day: Helena of Constantinople, also known as "Feast of the Holy Great Sovereigns Constantine and Helen, Equal-to-the-Apostles." (Eastern Orthodox Church, Anglican Communion)

Everything on May 21Original source

In context

When
May 21
Category
Holiday / observanceA holiday, feast day, awareness day or national day observed every year on this date.
Recorded from
Wikipedia “On this day” feed

What happened

Christian feast day: Helena of Constantinople, also known as "Feast of the Holy Great Sovereigns Constantine and Helen, Equal-to-the-Apostles." (Eastern Orthodox Church, Anglican Communion)

May 21 through the years

Other entries on the same calendar day, in order.

  1. 2006Republic of Montenegro (1992–2006)
  2. 2010JAXA
  3. 2011Harold Camping
  4. 2012Qafa e Vishës bus accident
  5. 20122012 Unity Day parade rehearsal bombing
  6. 20142014 Taipei Metro attack
  7. 2015Islamic State
  8. 2017Ringling Bros. and Barnum & Bailey Circus
  9. 2024Greenfield tornado
  10. 20242024 Taichung MRT attack

Sources

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“Helena, mother of Constantine I”, What's On This Date, https://whatsonthisdate.com/app/event/helena-mother-of-constantine-i-may-21, accessed October 27, 2026.

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