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Asked: 2026-05-23T09:06:46+00:00

I have some columns in a few tables in my database that are all

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I have some columns in a few tables in my database that are all in the localized server DateTime values. I want to convert these all to UTC DateTime values (does not need to be DateTime2 since it will be assumed the new values will be in UTC).

I would like to do this in a single SQL statement. I am not entirely sure how to perform this as I do not spend a lot of time in the database.

Assumptions can be made that my table name is TestTable and my localized DateTime column is called TestDateTime.

I would want the script to do the update to the table as well as the conversion.

Any way to possibly do this?

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1 Answer

  1. Editorial Team

    You can substract getutcdate() from getdate() to find the difference:

    select  DateAdd(s,DateDiff(s, getdate(),getutcdate()), LocalizedDateColumn)

    This assumes you are in the same summertime/wintertime state as the time you’re trying to convert. Not ideal, but the best conversion I know of that you can do in pure SQL.

    A C# client has a much stronger conversion:

    yourDateTime.ToUniversalTime()

    Unlike the SQL version, the .NET version will correctly convert a wintertime date during the summer.

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