Learn to perform the Day of the Week For Any Date (Revised) feat here.

Weekday Codes

Month Codes

Dates: 2000 to 2003

Leap Year Codes: 2000 to 2024

Leap Year Dates: 2000 to 2024

Leap Year Codes: 2000 to 2096

Leap Year Dates: 2000 to 2096

Year Codes: 2000 to 2099

Dates: 2000 to 2099

Dates: 1600 to 2399

Quiz will appear below:

## Day of the Week For Any Date Quiz (Revised)

Published on Tuesday, March 01, 2011 in calendar, feats, memory, mental math, workout

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## 32 Response to Day of the Week For Any Date Quiz (Revised)

Great site, but....10th August 2300 is a Friday. Your test says that it is Thursday. Pasted below is taken from the test

On which day of the week is August 10, 2300?

Correct answer(s):

Thursday

Correct answer verified by http://www.timeanddate.com/date/weekday.html

Siento rectificar tu dato: SerÃ¡ viernes. Saludos. P.D. Me gustaria conocer los cÃ³digos del siglo 2000-2100 y sucesivos, asÃ como del siglo 19. GRACIAS.

I second Steve West's comment.

I got Monday for June 11, 2300, and the answer came out as Sunday.

Otherwise, I love your site - it's simply ninjalistic! Thanks so much for taking the time to educate us!

Hey, why sometimes its minus by multiples 12 n multiples 28? can you guys tell me how ?

N i have tried January 11, 2020 which is January = 6, 11 = 4, 2020 = 4

So, 6 + 4 + 4 = 14 - 7 = 7, but 0 is sunday , 1 is monday... What day is 7?

Daphne, the day is Sunday! Remember that any multiple of 7, you can drop it which is like saying 0, so June = 3, the day is 11, 3+11=14, which is a multiple of 7, drop the 14, which is just like saying 0 and 0 = Sunday

@Ary Raditya..Whenever you're working in January or February dates in a leap year, you need to reduce the month code by 1 to compensate. Effectively the extra day, February 29, hasn't happened yet, so we're subtracting one to adjust for that fact. January becomes 5 (6 - 1) and February becomes 1 (2 - 1). So 5+4+4=13. 13-7=6. 6= Saturday

@lashon shaffer. Sorry, but you're wrong about 11th June 2300. Daphne is correct - it IS a MONDAY

2300 = 1

JUNE = 3

11 = 11

= 15 = Monday

Backed up by

http://www.calculatorcat.com/free_calculators/day_of_week.phtml

http://www.timeanddate.com/date/weekday.html

http://scphillips.com/cgi-bin/day.cgi

All agree that 11th June 2300 is a MONDAY

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Found an error in the quiz:

On which day of the week is February 9, 2200?

I put Sunday

Correct answer as shown in the quiz: Saturday

I kept checking my work then finally looked it up online and everything I see shows it to be Sunday. If it were a 00 divisible by 4 I could see how I would need to subtract 1, but this isn't the case.

Anthony Neubert you have to check it here http://www.wolframalpha.com/input/?i=February+9%2C+2200 ..

February=2

9=7*1+2

2200=0+3=3

2+2+3=7=7*1+0

0=Sunday

June 12, 2019

June = 3

12 = 5

2019 = 4

Sum = 12-7 = 5

should be Friday but it is wednesday

Puliti Chhabra, no, it should be Wednesday and it is.

2019 = 9 (2016 --> 6 + 3 = 9)

9 + 3 + 12 = 24 --> Wednesday

@lashon shaffer

But the year is 2300, so you need to add 1, so it is indeed Monday.

Error found: September 1, 1900 was a Saturday, not a Friday.

March 27, 1800 was a Thursday, not Wednesday.

Also, 12/31/2100=Friday

According to your algorithm 23rd feb 1924 should be

23=21+2=2

+

feb=2

+

1824=2+3 (2024=2, 1800s = +3) =5

Which gives a total of 9 which equals 2 = Tuesday. Yet 23rd feb was a Monday in 1824. Where am I wrong?

@endru: Subtract 1 for January in a Leap Year:

2/1/1824

February = 1

23rd = 2

1824 = 2 + 3 = 5

8 = 1 = Monday

(For January and February in a Leap Year)

This calendar does not take into account that the years 1800, 1900, 2100, 2200, 2300... are not leap years. They are multiples of four, but per the Gregorian calendar centuries are not leap years except for every fourth century (1600, 2000, 2400 which are). I found a similar issue to everybody else for March 29 2100.

Lots of comments here regarding the '00 years that are not leap years. Here's the simple explanation for figuring out these codes. We know that a year ending in '00 has a year code of zero. So all we have to do is make the correct adjustment for the century. We know we have to add 5 for dates in the 1700's, 3 for dates in the 1800's, and 1 for dates in the 1900's. This means that the year code for 1700 is a 5, 1800 is a 3, and 1900 is a 1. That's it!

I can't uderstand how to calculate the year and the date??

Hi, there is an error for 1900 March 6 : it says the answer is Monday but the correct answer is Tuesday (I asked Google)

2200 March 8th is not a Friday but a Saturday

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Seems there are errors for many 00 dates. Quiz told me that June 1 1900 was a thursday while I had calculated it to be a friday. Spent five minutes trying to find out what I had done wrong and then checked the date here: https://www.google.az/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=what%20day%20was%20june%201st%201900

Anyway great site and thanks for this method :) Will be practicing it a lot.

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