Monday December 25, 1009
A date scroll with Latin text from “The Extremes of Good and Evil” by Cicero, written in 45 BC.

December 25, 1009: Day of the Week

December 25, 1009 was the 359th day of the year 1009 in the Gregorian calendar. There were 6 days remaining until the end of the year. The day of the week was Monday.

The day of the week for December 25, 1009 under the old Julian calendar was Sunday. Did you notice the difference with the Gregorian calendar?

If you are trying to learn French then this day of the week in French is lundi.

A person born on this day will be 1,014 years old today. If that same person saved a Half dollar every day starting at age 7, then by now that person has accumulated $184,057.50 today.

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Here’s the December 1009 Gregorian calendar. You can also browse the full year monthly 1009 calendar.

December 1009
SunMonTueWedThuFriSat
     12
3456789
10111213141516
17181920212223
24252627282930
31      

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Zodiac & Birthstone

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

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December 25, 1009 by the Numbers

  • 370,672 days since December 25, 1009
  • 1,014 years, 10 months, and 11 days ago
  • 12,178 months since then
  • December 25 is in the 52nd week of the year 1009 (ISO 8601)
  • 52,953 weeks ago
  • The year 1009 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 (December 25, 1009). 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.