Monday May 12, 1231
A date scroll with Latin text from β€œThe Extremes of Good and Evil” by Cicero, written in 45 BC.

May 12, 1231: Day of the Week

May 12, 1231 was the 132nd day of the year 1231 in the Gregorian calendar. There were 233 days remaining until the end of the year. The day of the week was Monday.

The day of the week for May 12, 1231 under the old Julian calendar was Monday. Did you notice the similarity with the Gregorian calendar?

If you are trying to learn Spanish then this day of the week in Spanish is lunes.

A person born on this day will be 793 years old today. If that same person saved a Dime every day starting at age 6, then by now that person has accumulated $28,762.30 today.

Akto App πŸš€ Say hello to #AktoApp, the latest game-changer for video creators! Download now on Google Play Store and get ready to step up your short video creations πŸ“±πŸ’₯ (Sponsored)

Here’s the May 1231 Gregorian calendar. You can also browse the full year monthly 1231 calendar.

May 1231
SunMonTueWedThuFriSat
    123
45678910
11121314151617
18192021222324
25262728293031

Can you guess my birthday in just 6 tries? πŸ₯³πŸŽ‰ Give it a shot and see if you can crack the code! πŸŽ‚πŸŽˆ Play the Birthday Challenge here. (Sponsored by MyBirthday.Ninja)

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.

Ready for a new challenge? Try guessing my birthday in just 6 tries with this fun twist on Wordle! Let’s see if you can figure it out. πŸŽ‰πŸŽ‚ Play the Birthday Challenge now! (Sponsored by MyBirthday.Ninja)

May 12, 1231 by the Numbers

  • 289,815 days since May 12, 1231
  • 793 years, 5 months, and 24 days ago
  • 9,521 months since then
  • May 12 is in the 20th week of the year 1231 (ISO 8601)
  • 41,402 weeks ago
  • The year 1231 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 12, 1231). 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.

Share InfoNow try another date like anniversaries, birthdays of someone you know or any other date that is special to you. Don’t forget to share the info to your friends, loved ones or social media followers. Who knows, they might appreciate and thank you for it.