## September 10, 1001: Day of the Week

September 10, 1001 was the 253rd day of the year 1001 in the Gregorian calendar. There were 112 days remaining until the end of the year. The day of the week was Thursday.

The day of the week for September 10, 1001 under the old Julian calendar was Wednesday. 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 jueves.

A person born on this day will be 1,023 years old today. If that same person saved a Nickel every day starting at age 4, then by now that person has accumulated \$18,609.35 today.

It’s game time! 🎰 I've got a fun challenge for you—can I guess your date of birth in less than 20 tries? Here’s how it works: I’ll give you a series of dates, and based on your answers, I’ll try to figure out your special day 🎂 It’s all in good fun, and it’s all about you! 🥳 Give it a shot, and let’s see if I can nail it down with this birthday guessing game 🎉 (Sponsored by MyBirthday.Ninja)

Here’s the September 1001 Gregorian calendar. You can also browse the full year monthly 1001 calendar.

September 1001
SunMonTueWedThuFriSat
12345
6789101112
13141516171819
20212223242526
27282930

Can you guess my birthday in just 6 tries? 🥳🎉 Give it a shot and see if you can crack the code! 🎂🎈 Play the Birthday Challenge here. (Sponsored by MyBirthday.Ninja)

### 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.

Ready for a new challenge? Try guessing my birthday in just 6 tries with this fun twist on Wordle! Let’s see if you can figure it out. 🎉🎂 Play the Birthday Challenge now! (Sponsored by MyBirthday.Ninja)

### September 10, 1001 by the Numbers

• 373,648 days since September 10, 1001
• 1,023 years, 0 month, and 4 days ago
• 12,276 months since then
• September 10 is in the 37th week of the year 1001 (ISO 8601)
• 53,378 weeks ago
• The year 1001 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 10, 1001). 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.

Now 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.