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# 15 October 1582 followed directly upon 4 October by decree of Pope Gregory XIII
- URL: https://theparnassian.com/en/15-oktiabria-1582-goda-nastalo-srazu-za-4-oktiabria-po-resheniiu-papy-grigoriia-xiii/
- Published: 2016-10-15T09:54:07.000Z
- Updated: 2026-10-01T05:46:28.000Z
- Author: Alexandr Radayev
- Tags: NB!, Faith, Science, Society

15 October 1582 followed directly upon 4 October by decree of Pope Gregory XIII. Today is the birthday of the Gregorian calendar