May 23, 1573: Day of the Week

May 23, 1573 was the 143^rd day of the year 1573 in the Gregorian calendar. There were 222 days remaining until the end of the year. The day of the week was Wednesday.

The day of the week for May 23, 1573 under the old Julian calendar was Saturday. Did you notice the difference with the Gregorian calendar?

If you are trying to learn Japanese then this day of the week in Japanese is Suiyōbi.

A person born on this day will be 451 years old today. If that same person saved a Half dollar every day starting at age 6, then by now that person has accumulated $81,384.50 today.

Here’s the May 1573 Gregorian calendar. You can also browse the full year monthly 1573 calendar.

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.

May 23, 1573 by the Numbers

• 164,960 days since May 23, 1573
• 451 years, 7 months, and 21 days ago
• 5,419 months since then
• May 23 is in the 21^st week of the year 1573 (ISO 8601)
• 23,565 weeks ago
• The year 1573 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 (May 23, 1573). 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.