Question 1

When did we switch from Julian to Gregorian?

Accepted Answer

1582 in Catholic countries, 1752 in Britain/US, 1918 in Russia, 1923 in Greece.

Question 2

What is the difference between the calendars?

Accepted Answer

Julian loses 1 day every 128 years. Currently 13 days behind Gregorian.

Question 3

How do leap years affect these calculations?

Accepted Answer

Leap years add an extra day (Feb 29) every 4 years, except centuries not divisible by 400. Our calculator accounts for all leap year rules.

Question 4

Which calendar system does this use?

Accepted Answer

This uses the Gregorian calendar (standard worldwide since 1582). For historical dates before adoption, results may differ from Julian calendar dates.

Gregorian to Julian converter Tool - Free Online Tool

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