Tuesday December 21, 1520
A date scroll with Latin text from β€œThe Extremes of Good and Evil” by Cicero, written in 45 BC.

December 21, 1520: Day of the Week

December 21, 1520 was the 356th day of the year 1520 in the Gregorian calendar. There were 10 days remaining until the end of the year. The day of the week was Tuesday.

The day of the week for December 21, 1520 under the old Julian calendar was Friday. Did you notice the difference with the Gregorian calendar?

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

A person born on this day will be 503 years old today. If that same person saved a dollar every day starting at age 4, then by now that person has accumulated $182,604.00 today.

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Here’s the December 1520 Gregorian calendar. You can also browse the full year monthly 1520 calendar.

December 1520
SunMonTueWedThuFriSat
   1234
567891011
12131415161718
19202122232425
262728293031 

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Zodiac & Birthstone

Sagittarius 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 21, 1520 by the Numbers

  • 184,065 days since December 21, 1520
  • 503 years, 11 months, and 12 days ago
  • 6,047 months since then
  • December 21 is in the 52nd week of the year 1520 (ISO 8601)
  • 26,295 weeks ago
  • The year 1520 is 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 21, 1520). 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.