Sunday October 17, 1582
A date scroll with Latin text from β€œThe Extremes of Good and Evil” by Cicero, written in 45 BC.

: Day of the Week

was the of the year in the Gregorian calendar. There were until the end of the year. The day of the week was .

The day of the week for October 17, 1582 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 Nichiyōbi.

A person born on this day will be 442 years old today. If that same person saved a Dime every day starting at age 3, then by now that person has accumulated $16,060.20 today.

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Here’s the . You can also browse the full year monthly .

October 1582
SunMonTueWedThuFriSat
     12
3456789
1011121314
      

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Zodiac & Birthstone

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

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by the Numbers

  • days since
  • years, months, and days ago
  • months since then
  • is in the st week of the year (ISO 8601)
  • weeks ago
  • The year is not a leap year

Who was born on ?

Johann Gerhard, German Lutheran leader (d. 1637)

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 (October 17, 1582). 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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