Day of Week Calculator

Calculates the day of the week from date.

Day of Week
Date

The Gregorian calendar is used for dates on and after October 15, 1582 A.D. and the Julian calendar is used before October 4, 1582.
    Day of Week
    [1-10] /12Disp-Num
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    [1]  2022/12/02 10:55   40 years old level / An engineer / Very /
    Purpose of use
    Calculating the day of week for any JD of the Bible
    Comment/Request
    I have my own program to calculate this, because I just do not trust other people's math. But, I now like using this program, as it is accurate and more user friendly than my program.
    [2]  2022/07/12 21:15   60 years old level or over / A retired person / - /
    Purpose of use
    Wanting to know years with Tuesday 20 April
    [3]  2020/01/31 23:21   Under 20 years old / Elementary school/ Junior high-school student / Useful /
    Purpose of use
    I like to research different things for fu.
    Comment/Request
    This is cool
    [4]  2020/01/18 05:22   40 years old level / A teacher / A researcher / Not at All /
    Purpose of use
    To point out the error in the page
    Comment/Request
    I was taken to surprise when I noted that for most of the dates, we get incorrect days as answer when I used this page for calculating the days. As example to quote, 15th March, 44 BC (When Ceasar was murdered) the calculation returns as Wednesday which by actual calculation turns to be Friday. Further for every 400 years the Gregorian calendar repeats itself with same days altogether. In that aspect, we would expect same day for both 15th March, 44 BC as well as 15th March 357 AD which according to this calculation turns to be on Saturday which actually should be on Friday. I request you to kindly check these errors and make necessary changes to get right answers. I have been carrying research work in calendars right from my young age and I have more than 20 books in view of popularizing mathematics in India. Hope you find these information useful and take this comment in right spirit because we should not spread false information in social media. Thanks.
    [5]  2019/11/21 20:22   40 years old level / Self-employed people / Useful /
    Purpose of use
    Research for historical fiction novel
    Comment/Request
    For the previous commenter from September, 2019:
    539 BC is calculated as -538, since the AD/BC numbering system has no year 0 between 1 BC and 1 AD.
    Examples: year 0 = 1 BCE, -100 is 101 BCE, -538 is 539 BCE.
    [6]  2019/09/21 23:46   40 years old level / Others / Useful /
    Purpose of use
    To find the day of the week for Oct 5 539 BCE
    Comment/Request
    What day of the week is Oct 5 539 BCE, Sun or Mon? If I type Oct 5th 539 BC it gives the result for -538 BC which is Monday. If I type Oct 5th 540 BC the result is Oct 5th -539 BC which is a Sunday. Which one is correct?
    [7]  2018/11/08 20:12   60 years old level or over / A retired person / Useful /
    Purpose of use
    General interest and curiosity
    Bug report
    In Microsoft, this formula:
    =TEXT("1/1/1900","dddd")
    gives Sunday

    but this web site gives Monday.

    One or other is wrong, unless it's me.
    from Keisan
    There are bugs in Excel concerning dates.
    The correct answer is 'Monday'.
    https://en.wikipedia.org/wiki/January_1900
    https://www.journalofaccountancy.com/issues/2015/aug/excel-date-formatting.html
    [8]  2018/11/07 21:32   50 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    Problem solving, handling difficult people, customer service
    [9]  2018/07/30 06:23   60 years old level or over / A retired people / Useful /
    Purpose of use
    to calculate Biblical things.
    Comment/Request
    My main question has to do with time in other places (eg. Jerusalem). Is your calculator set up to use different places in calculations?
    [10]  2018/03/15 12:10   50 years old level / A retired people / Very /
    Purpose of use
    Very useful To calculate the dates of events happened in the remote past

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