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==Gregorian Calendar== | ==Gregorian Calendar== | ||
The Gregorian calendar, the one we use today, is a refinement of the Julian calendar. Introduced in 1582 by Pope Gregory XIII, it aimed to fix a slight inaccuracy in the Julian system that caused it to drift out of sync with the seasons over time. The Gregorian calendar, like its predecessor, is a solar calendar with 12 months and a leap year every four years. However, the leap year rules are more precise. Centuries (years ending in 00) are not leap years unless they are divisible by 400. So, for instance, 1600 was a leap year while 1700, 1800, and 1900 were not. This adjustment ensures the calendar stays aligned with the solar year, making sure holidays like the spring equinox and the summer solstice land on the correct dates. Due to its accuracy and widespread adoption, the Gregorian calendar is the dominant calendar system across the globe. | |||
===1582-1837=== | ===1582-1837=== | ||
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