What day of the week is this date?

Sunday July 15, 1663

July 15, 1663: Day of the Week

July 15, 1663 was the 196th day of the year 1663 in the Gregorian calendar. There were 169 days remaining until the end of the year. The day of the week was Sunday.

The day of the week for July 15, 1663 under the old Julian calendar was Wednesday. Did you notice the difference with the Gregorian calendar?

If you are trying to learn Spanish then this day of the week in Spanish is domingo.

A person born on this day will be 356 years old today. If that same person saved a Half dollar every day starting at age 6, then by now that person has accumulated $63,920.50 today.

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Here’s the July 1663 Gregorian calendar. You can also browse the full year monthly 1663 calendar.

July 1663
SunMonTueWedThuFriSat
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891011121314
15161718192021
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Zodiac & Birthstone

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

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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 (July 15, 1663). 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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