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1. ### en.wikipedia.org › wiki › History_of_calendarsHistory of calendars - Wikipedia

This resulted in scribes and scholars referring to them as "the first month", "the fifth month", etc. [citation needed] To keep the lunar year of 354 days in step with the solar year of 365.242 days an extra month was added periodically, much like a Gregorian leap year.

2. ### artofmemory.com › blog › how-to-calculate-the-day-ofHow to Calculate the Day of the Week from Any Date

Jul 27, 2012 · EDIT: If the date is in a January or February of a leap year, you have to subtract one from your total before the final step. Gregorian Calendar. If you can divide a Gregorian year by 4, it’s a leap year, unless it’s divisible by 100. But it is a leap year if it’s divisible by 400.

3. ### www.timeanddate.com › calendar › seasonsSeasons: Dates of Spring, Summer, Fall & Winter - Time and Date

Moon Phase Calendar – Calculate moon phases for any year. Sunrise Calculator – Find times for sunrise, sunset and more. Day and Night World Map – See which parts of the Earth are currently illuminated by the Sun. More Information. An Explanation on Equinoxes; Calendar Tools. Calendar for 2022; Calendar Generator – Create a calendar for ...

4. ### en.wikipedia.org › wiki › August_4August 4 - Wikipedia

August 4 is the 216th day of the year (217th in leap years) in the Gregorian calendar; 149 days remain until the end of the year.

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