Saturday September 30, 1161
A date scroll with Latin text from “The Extremes of Good and Evil” by Cicero, written in 45 BC.

September 30, 1161: Day of the Week

September 30, 1161 was the 273rd day of the year 1161 in the Gregorian calendar. There were 92 days remaining until the end of the year. The day of the week was Saturday.

The day of the week for September 30, 1161 under the old Julian calendar was Saturday. 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 sábado.

A person born on this day will be 863 years old today. If that same person saved a dollar every day starting at age 4, then by now that person has accumulated $314,004.00 today.

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Here’s the September 1161 Gregorian calendar. You can also browse the full year monthly 1161 calendar.

September 1161
SunMonTueWedThuFriSat
     12
3456789
10111213141516
17181920212223
24252627282930

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Zodiac & Birthstone

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

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September 30, 1161 by the Numbers

  • 315,465 days since September 30, 1161
  • 863 years, 8 months, and 18 days ago
  • 10,364 months since then
  • September 30 is in the 39th week of the year 1161 (ISO 8601)
  • 45,066 weeks ago
  • The year 1161 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 (September 30, 1161). 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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