Anniversary of Gregorian Calendar
Reforming time since 1582
This event celebrates the reform of the calendar system that improved date accuracy by aligning the calendar year with the solar year. Introduced by Pope Gregory XIII, it replaced the Julian calendar. Its adoption corrected the drift from the equinoxes and is still used by most of the world today.
- Global Release
- First Release Sep 27, 2025
- Oct 1 → Oct 4 Annually
- https://en.wikipedia.org/wiki/Gregorian_calendar
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The stamp description may contain AI-generated text and inaccuracies. It is provided for reference only, primarily sourced from Wikipedia, UNESCO, and other reliable references.
