Monday May 14, 1263
A date scroll with Latin text from β€œThe Extremes of Good and Evil” by Cicero, written in 45 BC.

May 14, 1263: Day of the Week

May 14, 1263 was the 134th day of the year 1263 in the Gregorian calendar. There were 231 days remaining until the end of the year. The day of the week was Monday.

The day of the week for May 14, 1263 under the old Julian calendar was Monday. Did you notice the similarity with the Gregorian calendar?

If you are trying to learn Japanese then this day of the week in Japanese is Getsuyōbi.

A person born on this day will be 761 years old today. If that same person saved a Penny every day starting at age 5, then by now that person has accumulated $2,764.04 today.

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Here’s the May 1263 Gregorian calendar. You can also browse the full year monthly 1263 calendar.

May 1263
SunMonTueWedThuFriSat
  12345
6789101112
13141516171819
20212223242526
2728293031  

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Zodiac & Birthstone

Taurus is the zodiac sign of a person born on this day. Emerald is the modern birthstone for this month. Sapphire is the mystical birthstone from Tibetan origin that dates back over a thousand years.

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May 14, 1263 by the Numbers

  • 278,231 days since May 14, 1263
  • 761 years, 9 months, and 5 days ago
  • 9,141 months since then
  • May 14 is in the 20th week of the year 1263 (ISO 8601)
  • 39,747 weeks ago
  • The year 1263 is not a leap year

Gregorian versus the old Julian calendar

A note to students, teachers, scholars and anyone else passionate about this topic. As stated in the front page, this website is using the Gregorian calendar as the basis for all “day of the week” computation whether or not the Gregorian calendar is relevant for the date in question (May 14, 1263). Educators should point out the primary reason why Pope Gregory XIII introduced a new calendar system in October 1582. That is, to make the computation for the annual date of Easter more accurate since it is the foundation of the Christian faith.

Even with that purpose in mind, the Gregorian calendar too will become out of sync. It has a known approximation error of about one day for every 7,700 years assuming a constant time interval between vernal equinoxes (which is not true). This is better compared to the one day for every 128 years error of the Julian calendar.

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