Thursday August 13, 1503
A date scroll with Latin text from โ€œThe Extremes of Good and Evilโ€ by Cicero, written in 45 BC.

August 13, 1503: Day of the Week

August 13, 1503 was the 225th day of the year 1503 in the Gregorian calendar. There were 140 days remaining until the end of the year. The day of the week was Thursday.

The day of the week for August 13, 1503 under the old Julian calendar was Sunday. 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 521 years old today. If that same person saved a Dime every day starting at age 7, then by now that person has accumulated $18,792.60 today.

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Here’s the August 1503 Gregorian calendar. You can also browse the full year monthly 1503 calendar.

August 1503
SunMonTueWedThuFriSat
      1
2345678
9101112131415
16171819202122
23242526272829
3031     

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Zodiac & Birthstone

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

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August 13, 1503 by the Numbers

  • 190,483 days since August 13, 1503
  • 521 years, 6 months, and 6 days ago
  • 6,258 months since then
  • August 13 is in the 33rd week of the year 1503 (ISO 8601)
  • 27,211 weeks ago
  • The year 1503 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 (August 13, 1503). 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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