PS D:\> $oUNIXDate=(Get-Date 01.01.1970)+([System.TimeSpan]::fromseconds(1537615930))
PS D:\> $oUNIXDate
Samstag, 22. September 2018 11:32:10

6 thoughts on “Powershell: Convert UNIX Timestamp to DateTime”

1. Hi! Another way:
   $Date = (Get-Date 01.01.1970).AddSeconds(1537615930)

   Log in to Reply

   1. Keep in mind that you’re going to get a local time that way. i’m pretty sure that the Epoch is defined as jan 1, 1970 GMT.

      Log in to Reply

   2. Unable to convert the number # 1589997744995 .

      $oUNIXDate=(Get-Date 01.01.1970)+([System.TimeSpan]::fromseconds(1589997744995))
      Exception calling “FromSeconds” with “1” argument(s): “TimeSpan overflowed because the duration is too long.”
      At line:1 char:1
      + $oUNIXDate=(Get-Date 01.01.1970)+([System.TimeSpan]::fromseconds(1589 …
      + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      + CategoryInfo : NotSpecified: (:) [], MethodInvocationException
      + FullyQualifiedErrorId : OverflowException

      Log in to Reply

      1. It would be 50000 years later.

         People using recently released Powershell 7.1 could try
         Get-Date -UnixTimeSeconds 1537615930

         Log in to Reply

2. I was able to get it to work, using what another separate article suggested for another language by removing the last 3 digits. In the parentheses where the 13 character integer string is, add “/ 1000” at the end, then run it. It worked for me.

   What I ran in PS:
   $oUNIXDate=(Get-Date 01.01.1970)+([System.TimeSpan]::fromseconds(1627505005033 / 1000))

   What I got when I ran $oUNIXDate:
   Wednesday, July 28, 2021 8:43:25 PM

   Log in to Reply

   1. That worked perfectly, thanks!

      Log in to Reply