Tuesday December 27, 1155
A date scroll with Latin text from โ€œThe Extremes of Good and Evilโ€ by Cicero, written in 45 BC.

December 27, 1155: Day of the Week

December 27, 1155 was the 361st day of the year 1155 in the Gregorian calendar. There were 4 days remaining until the end of the year. The day of the week was Tuesday.

The day of the week for December 27, 1155 under the old Julian calendar was Tuesday. Did you notice the similarity with the Gregorian calendar?

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

A person born on this day will be 868 years old today. If that same person saved a Cent every day starting at age 3, then by now that person has accumulated $3,162.48 today.

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Here’s the December 1155 Gregorian calendar. You can also browse the full year monthly 1155 calendar.

December 1155
SunMonTueWedThuFriSat
    123
45678910
11121314151617
18192021222324
25262728293031

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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 27, 1155 by the Numbers

  • 317,344 days since December 27, 1155
  • 868 years, 10 months, and 8 days ago
  • 10,426 months since then
  • December 27 is in the 52nd week of the year 1155 (ISO 8601)
  • 45,334 weeks ago
  • The year 1155 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 27, 1155). 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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