Thursday September 14, 1009
A date scroll with Latin text from β€œThe Extremes of Good and Evil” by Cicero, written in 45 BC.

September 14, 1009: Day of the Week

September 14, 1009 was the 257th day of the year 1009 in the Gregorian calendar. There were 108 days remaining until the end of the year. The day of the week was Thursday.

The day of the week for September 14, 1009 under the old Julian calendar was Wednesday. Did you notice the difference with the Gregorian calendar?

If you are trying to learn Japanese then this day of the week in Japanese is Mokuyōbi.

A person born on this day will be 1,015 years old today. If that same person saved a Penny every day starting at age 6, then by now that person has accumulated $3,685.38 today.

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

September 1009
SunMonTueWedThuFriSat
     12
3456789
10111213141516
17181920212223
24252627282930

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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 14, 1009 by the Numbers

  • 370,729 days since September 14, 1009
  • 1,015 years, 0 month, and 7 days ago
  • 12,180 months since then
  • September 14 is in the 37th week of the year 1009 (ISO 8601)
  • 52,961 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 (September 14, 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.

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