Thursday September 15, 1459
A date scroll with Latin text from “The Extremes of Good and Evil” by Cicero, written in 45 BC.

September 15, 1459: Day of the Week

September 15, 1459 was the 258th day of the year 1459 in the Gregorian calendar. There were 107 days remaining until the end of the year. The day of the week was Thursday.

The day of the week for September 15, 1459 under the old Julian calendar was Saturday. Did you notice the difference with the Gregorian calendar?

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

A person born on this day will be 565 years old today. If that same person saved a Quarter every day starting at age 5, then by now that person has accumulated $51,207.25 today.

Birthday Guessing NinjaIt’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 1459 Gregorian calendar. You can also browse the full year monthly 1459 calendar.

September 1459
SunMonTueWedThuFriSat
    123
45678910
11121314151617
18192021222324
252627282930 

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.

Coffee Love Holy Toledo! Did you know that coffee and word games are an excellent combination to sharpen your vocabulary? Let’s give it a quick spin. Within 30 seconds, how many words can you think of from these letters OUQAGCM? Check your answers here: Unscramble words OUQAGCM. (Sponsored by WordFinder.Cafe)

September 15, 1459 by the Numbers

  • 206,656 days since September 15, 1459
  • 565 years, 9 months, and 20 days ago
  • 6,789 months since then
  • September 15 is in the 37th week of the year 1459 (ISO 8601)
  • 29,522 weeks ago
  • The year 1459 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, 1459). 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.

Share InfoNow 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.