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Understanding DateTimeUtil::newdatetime

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Posted on by Tony zhong 897

Hi guys,

I'm trying to understand DateTimeUtil especially with method NewDateTime.When I have a field TransDate and entered as '28/10/2021", by using this code :

utcdatetime myDatetime;

myDatetime = DateTimeUtil::newdatetime(TransDate, 0);

Shouldn't this means I do not want the time detail ? In fact TransDate is Date type without time. But strange is why after this code ran, the utc field became "27/10/2021 05:00:PM" ?

My environment when I enter this is :

VM's set as UTC (Coordinated Universal Time), and at time enter is 1 PM, and my User Option - Preferences is set GMT - 8. 

I can understand if my VM's time is 1 AM, so calculate back 8 hours will be the previous day 5 PM, but my VM says 1 PM.

But the important is want to the same date, even when the field is with UTCDatetime. 

Thanks,

  • Tony zhong Profile Picture
    Tony zhong 897 on at
    RE: Understanding DateTimeUtil::newdatetime

    Hi both,

    Thanks,

    Yes, I think it is fine. If checked in SQL, it is correct as 00:00, and why it is displayed as 5PM I guess because even though the Timezone is set to GMT-8, but region is US which (my guess) last week still daylight saving, right? so move back 7 hours from 28/10/2021 00:00 ? I didn't check again now, but to me is ok, it is matter of display only, based on computer's region.

    And I'm using Transdate but have to get the utc format as I will use it for Dual-Write, the Dataverse counter part is datetime. And at first make me scared when I look at the date become previous date of the Transdate value it self.

    Issue solved.

    Thanks.

  • Suggested answer
    Leo Chen Profile Picture
    Leo Chen on at
    RE: Understanding DateTimeUtil::newdatetime

    Per my test, the method always return UTC time. 0 stands for start of a day so it implies 12:00 am. Doc as below -

    docs.microsoft.com/.../dynamics.ax.application.datetimeutil.newdatetime

    And the result has nothing do with your user preferred timezone setup in user option if your code resembles below. The outcome remains same before & after I changed my user time zone setup. 

    pastedimage1636504886224v1.png

  • André Arnaud de Calavon Profile Picture
    André Arnaud de Cal... 291,642 Super User 2024 Season 2 on at
    RE: Understanding DateTimeUtil::newdatetime

    Hi Tony,

    The method NewDateTime has a third parameter to remove the time zone offset.

    If you need a TransDate, why are you using this method?

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