Saturday September 15, 1010
A date scroll with Latin text from โ€œThe Extremes of Good and Evilโ€ by Cicero, written in 45 BC.

September 15, 1010: Day of the Week

September 15, 1010 was the 258th day of the year 1010 in the Gregorian calendar. There were 107 days remaining until the end of the year. The day of the week was Saturday.

The day of the week for September 15, 1010 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 sábado.

A person born on this day will be 1,014 years old today. If that same person saved a Penny every day starting at age 5, then by now that person has accumulated $3,688.21 today.

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Here’s the September 1010 Gregorian calendar. You can also browse the full year monthly 1010 calendar.

September 1010
SunMonTueWedThuFriSat
      1
2345678
9101112131415
16171819202122
23242526272829
30      

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Zodiac & Birthstone

Virgo 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 15, 1010 by the Numbers

  • 370,647 days since September 15, 1010
  • 1,014 years, 9 months, and 17 days ago
  • 12,177 months since then
  • September 15 is in the 37th week of the year 1010 (ISO 8601)
  • 52,949 weeks ago
  • The year 1010 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 15, 1010). 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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