Friday May 30, 1423
A date scroll with Latin text from β€œThe Extremes of Good and Evil” by Cicero, written in 45 BC.

May 30, 1423: Day of the Week

May 30, 1423 was the 150th day of the year 1423 in the Gregorian calendar. There were 215 days remaining until the end of the year. The day of the week was Friday.

The day of the week for May 30, 1423 under the old Julian calendar was Sunday. 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 vendredi.

A person born on this day will be 602 years old today. If that same person saved a Dime every day starting at age 5, then by now that person has accumulated $21,808.10 today.

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Here’s the May 1423 Gregorian calendar. You can also browse the full year monthly 1423 calendar.

May 1423
SunMonTueWedThuFriSat
    123
45678910
11121314151617
18192021222324
25262728293031

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Zodiac & Birthstone

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

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May 30, 1423 by the Numbers

  • 219,908 days since May 30, 1423
  • 602 years, 1 month, and 0 day ago
  • 7,225 months since then
  • May 30 is in the 22nd week of the year 1423 (ISO 8601)
  • 31,415 weeks ago
  • The year 1423 is not a leap year

Who was born on May 30, 1423?

1423
Georg Purbach, German mathematician and astronomer (d. 1461)

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 (May 30, 1423). 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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