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Day of the Week For Any Date Quiz (Revised)

Published on Tuesday, March 01, 2011 in , , , ,

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:

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

March 1, 2014 at 9:40 PM
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August 6, 2014 at 1:35 PM

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

October 5, 2014 at 2:37 PM

Siento rectificar tu dato: Será viernes. Saludos. P.D. Me gustaria conocer los códigos del siglo 2000-2100 y sucesivos, así como del siglo 19. GRACIAS.

November 30, 2014 at 11:27 AM
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November 30, 2014 at 11:33 AM

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!

January 8, 2015 at 5:52 PM

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

January 8, 2015 at 6:03 PM

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?

January 14, 2015 at 12:34 PM

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

January 22, 2015 at 2:27 AM

@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

January 31, 2015 at 2:16 AM

@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

April 15, 2015 at 2:13 AM

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May 7, 2015 at 9:54 AM

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.

September 4, 2015 at 9:13 AM

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

September 22, 2015 at 10:39 AM

June 12, 2019
June = 3
12 = 5
2019 = 4
Sum = 12-7 = 5
should be Friday but it is wednesday

October 25, 2015 at 6:49 AM

Puliti Chhabra, no, it should be Wednesday and it is.
2019 = 9 (2016 --> 6 + 3 = 9)
9 + 3 + 12 = 24 --> Wednesday

October 25, 2015 at 6:54 AM

@lashon shaffer

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

November 6, 2015 at 7:00 AM
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November 6, 2015 at 7:03 AM
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November 6, 2015 at 7:25 AM
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November 11, 2015 at 3:19 PM

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

November 11, 2015 at 7:04 PM

March 27, 1800 was a Thursday, not Wednesday.

November 11, 2015 at 7:08 PM

Also, 12/31/2100=Friday

January 6, 2016 at 5:31 PM

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?

January 7, 2016 at 4:06 PM

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

2/1/1824

February = 1
23rd = 2
1824 = 2 + 3 = 5

8 = 1 = Monday

January 7, 2016 at 4:07 PM

(For January and February in a Leap Year)

May 11, 2016 at 5:45 AM

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.

May 14, 2016 at 8:01 PM

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!

June 13, 2016 at 12:58 PM

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

August 30, 2016 at 2:14 AM

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

September 6, 2016 at 7:07 AM

2200 March 8th is not a Friday but a Saturday

November 7, 2016 at 2:40 PM

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