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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Calculate number of mo...
Small and medium business | Business Central, N...
Answered

Calculate number of month between two dates

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Posted on by Mehdi26 447

Hi 

I want to calculate the number of month between a fromDate and ToDate. 

  • Salba Z.K Profile Picture
    Salba Z.K 127 on at
    RE: Calculate number of month between two dates

    Thanks, it worked

  • Suggested answer
    YUN ZHU Profile Picture
    YUN ZHU 79,602 Super User 2025 Season 1 on at
    RE: Calculate number of month between two dates
    Hi, The calculation of the number of days only needs to be as follows.
            Day := EndDate - StartDate;
     Alternatively, you can try table 2000000007 "Date", which can also be calculated.
    Hope this helps.
    Thanks.
    ZHU
  • Salba Z.K Profile Picture
    Salba Z.K 127 on at
    RE: Calculate number of month between two dates

    How can we calculate days, as number of days are not fixed in year and month?

  • Netjacker2097 Profile Picture
    Netjacker2097 273 on at
    RE: Calculate number of month between two dates

    That working as it should, thanks for that ...had to adjust the code slightly to suite my scenario.

    Thanks..

  • Suggested answer
    NavNab Profile Picture
    NavNab 4 on at
    RE: Calculate number of month between two dates

    another suggestion just in case:

    Date.Setrange("Period Type", Date."Period Type"::Month);

    Date.Setfilter("Period Start", '>=%1&<=%2', StartDate, EndDate);

    Message('Months between %1 and %2 is %3', StartDate, EndDate, Date.Count - 1);

    Variable >> Date: Record Date

  • Netjacker2097 Profile Picture
    Netjacker2097 273 on at
    RE: Calculate number of month between two dates

    Hi,

    How would you change your sample calculation to suite a service date - next service date = No. of days bitween.

    but i need another coloum to show the current no.of days left till next service.

    hope it makes sence.

  • Suggested answer
    Mehdi26 Profile Picture
    Mehdi26 447 on at
    RE: Calculate number of month between two dates

    I did it this way:

    Clear(NoOfMonths);
NoOfMonths := DATE2DMY("Shipment Date", 2) - DATE2DMY(TODAY, 2)   12 * (DATE2DMY("Shipment Date", 3) - DATE2DMY(TODAY, 3));

    But ZHU's answer is also correct. 

  • Verified answer
    YUN ZHU Profile Picture
    YUN ZHU 79,602 Super User 2025 Season 1 on at
    RE: Calculate number of month between two dates

    Hi, as Josh Anglesea said, you should pay attention to different years.

    A simple example: for reference only

    pageextension 50100 MyExtension extends "Customer List"
{
    trigger OnOpenPage()
    begin
        Message('Months between %1 and %2 is %3', 20150101D, Today, CalculateMonthBetweenTwoDate(20150101D, Today));
    end;

    local procedure CalculateMonthBetweenTwoDate(StartDate: Date; EndDate: Date): Integer
    var
        NoOfYears: Integer;
        NoOfMonths: Integer;
    begin
        NoOfYears := DATE2DMY(EndDate, 3) - DATE2DMY(StartDate, 3);
        NoOfMonths := DATE2DMY(EndDate, 2) - DATE2DMY(StartDate, 2);
        exit(12 * NoOfYears   NoOfMonths);
    end;
}

    pastedimage1632966783619v1.png

    Hope this will help.

    Thanks.

    ZHU

  • JAngle Profile Picture
    JAngle 73 on at
    RE: Calculate number of month between two dates

    Does that assume it’s the same year?

  • Suggested answer
    Teddy Herryanto (That NAV Guy) Profile Picture
    Teddy Herryanto (Th... 13,219 Moderator on at
    RE: Calculate number of month between two dates

    Use Date2DMY to get the both month for comparison.

    fromMonth := Date2DMY(fromDate,2);

    toMonth := Date2DMY(toDate,2);

    Diff := toMonth - fromMonth;

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