Monday May 8, 1139
A date scroll with Latin text from “The Extremes of Good and Evil” by Cicero, written in 45 BC.

May 8, 1139: Day of the Week

May 8, 1139 was the 128th day of the year 1139 in the Gregorian calendar. There were 237 days remaining until the end of the year. The day of the week was Monday.

The day of the week for May 8, 1139 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 885 years old today. If that same person saved a dollar every day starting at age 5, then by now that person has accumulated $321,629.00 today.

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Here’s the May 1139 Gregorian calendar. You can also browse the full year monthly 1139 calendar.

May 1139
SunMonTueWedThuFriSat
 123456
78910111213
14151617181920
21222324252627
28293031   

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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 8, 1139 by the Numbers

  • 323,456 days since May 8, 1139
  • 885 years, 7 months, and 1 day ago
  • 10,627 months since then
  • May 8 is in the 19th week of the year 1139 (ISO 8601)
  • 46,208 weeks ago
  • The year 1139 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 8, 1139). 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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