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[SOLVED] workday function --> calculate START date

  1. #1
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    [SOLVED] workday function --> calculate START date

    Hello,

    The workday function can return the end date based on start date and duration, excluding weekends. However, I want to calculate start date based on end date and duration also weekends.

    For example

    Start Date: ?
    Finish Date: 27 Jul 2010
    Duration: 3 days

    The Start Date should be 24 July 2010

    I would very much appreciate it if you would take a look at this problem, many thanks in advance for your help!

    Regards,

    Kaatje
    Last edited by kaaver; 06-14-2010 at 09:17 AM.

  2. #2
    Administrator JBeaucaire's Avatar
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    Re: workday function --> calculate START date

    The WORKDAY() function works in both directions.

    A3 --- End Date
    A4 --- Duraition

    Formula in A2:
    =WORKDAY(A3, -A4)

    The answer is 22 July, 2010, though.


    If you do not want to skip weekends:
    =A3-A4
    ...formatted as Date.
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    Forum Guru Bob Phillips's Avatar
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    Re: workday function --> calculate START date

    Try

    =WORKDAY(end_date,-days)

  4. #4
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    Re: workday function --> calculate START date

    Simple answer, I should have known this! Thanks to you both!

    Regards,

    Kaatje

  5. #5
    Administrator JBeaucaire's Avatar
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    Re: workday function --> calculate START date

    If that takes care of your need, please click EDIT in your original post, click GO ADVANCED and set the PREFIX box to SOLVED.

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