October 17, 1258: Day of the Week
October 17, 1258 was the 290th day of the year 1258 in the Gregorian calendar. There were 75 days remaining until the end of the year. The day of the week was Thursday.
The day of the week for October 17, 1258 under the old Julian calendar was Thursday. Did you notice the similarity with the Gregorian calendar?
If you are trying to learn Spanish then this day of the week in Spanish is jueves.
A person born on this day will be 765 years old today. If that same person saved a Nickel every day starting at age 5, then by now that person has accumulated $13,896.05 today.
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Here’s the October 1258 Gregorian calendar. You can also browse the full year monthly 1258 calendar.
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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 17, 1258 by the Numbers
- 279,747 days since October 17, 1258
- 765 years, 11 months, and 1 day ago
- 9,191 months since then
- October 17 is in the 42nd week of the year 1258 (ISO 8601)
- 39,963 weeks ago
- The year 1258 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 (October 17, 1258). 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.
Now try another date like anniversaries, birthdays of someone you know or any other date that is special to you. Don’t forget to share the info to your friends, loved ones or social media followers. Who knows, they might appreciate and thank you for it.