Wednesday October 18, 1420
A date scroll with Latin text from โ€œThe Extremes of Good and Evilโ€ by Cicero, written in 45 BC.

October 18, 1420: Day of the Week

October 18, 1420 was the 292nd day of the year 1420 in the Gregorian calendar. There were 74 days remaining until the end of the year. The day of the week was Wednesday.

The day of the week for October 18, 1420 under the old Julian calendar was Friday. 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 mercredi.

A person born on this day will be 604 years old today. If that same person saved a Nickel every day starting at age 5, then by now that person has accumulated $10,950.95 today.

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Here’s the October 1420 Gregorian calendar. You can also browse the full year monthly 1420 calendar.

October 1420
SunMonTueWedThuFriSat
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891011121314
15161718192021
22232425262728
293031    

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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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October 18, 1420 by the Numbers

  • 220,845 days since October 18, 1420
  • 604 years, 7 months, and 26 days ago
  • 7,255 months since then
  • October 18 is in the 42nd week of the year 1420 (ISO 8601)
  • 31,549 weeks ago
  • The year 1420 is 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 (October 18, 1420). 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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