Day-Date Discrepancy in Gregorian Calendar

Author(s)	Tanaji Santra
Country	India
Abstract	In 46 BC, Roman Emperor Julius Caesar introduced the Julian Calendar by reforming the ancient Roman Calendar. The Gregorian Calendar was introduced in 1582 to correct the average year time of the Julian Calendar. According to mathematics, the tropical year is 365 days, 5 hours, 48 minutes, and 46 seconds, or 365.24181 days, determined by the Earth’s revolution around the Sun. In the Julian Calendar, the average year time considered was 365.25 days, but in the Gregorian Calendar, the accuracy was increased by considering it as 365.2422 days. The Gregorian Calendar was introduced in October 1582 and adopted by most countries in the 17th century. In 1752, Britain and the USA accepted the Gregorian Calendar by skipping 11 days from their Julian Calendar. By doing this, they corrected the date but did not calculate the days correctly, meaning 2nd September (Wednesday) was followed by 14th September (Thursday). According to this study, 14th September 1752 should have been a Monday instead of Thursday. The explanation is provided below.
Keywords	Calendar; Gregorian Calendar; 1582 October; 1752 September
Field	Physics > Astronomy
Published In	Volume 7, Issue 1, January-February 2025
Published On	2025-01-29
Cite This	Day-Date Discrepancy in Gregorian Calendar - Tanaji Santra - IJFMR Volume 7, Issue 1, January-February 2025.

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