Saturday April 17, 1582
A date scroll with Latin text from โ€œThe Extremes of Good and Evilโ€ by Cicero, written in 45 BC.

April 17, 1582: Day of the Week

April 17, 1582 was the 107th day of the year 1582 in the Gregorian calendar. There were 258 days remaining until the end of the year. The day of the week was Saturday.

The day of the week for April 17, 1582 under the old Julian calendar was Tuesday. 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 samedi.

A person born on this day will be 442 years old today. If that same person saved a Quarter every day starting at age 7, then by now that person has accumulated $39,767.50 today.

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Here’s the April 1582 Gregorian calendar. You can also browse the full year monthly 1582 calendar.

April 1582
SunMonTueWedThuFriSat
    123
45678910
11121314151617
18192021222324
252627282930 

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Zodiac & Birthstone

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

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April 17, 1582 by the Numbers

  • 161,627 days since April 17, 1582
  • 442 years, 6 months, and 6 days ago
  • 5,310 months since then
  • April 17 is in the 15th week of the year 1582 (ISO 8601)
  • 23,089 weeks ago
  • The year 1582 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 (April 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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