Windows ISO 8601 timestamp

Question

I need to convert a date in Windows PowerShell to the ISO 8601 format.

In Linux/Unix it was no problem with

TZ=0 date -d \"\"          


        

Answer 1

PowerShell's Get-Date supports standard .NET time formats. The o round-trip format complies with ISO 8601. Like so,

Get-Date -Format "o"

2017-08-15T12:10:34.4443084+03:00

Answer 2

The following works both in Windows PowerShell 5.1 and PowerShell 7.0 on Windows/OS X:

 (Get-Date).ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.fffK")
 
 2020-12-01T22:31:41.402Z

If you don't want your milliseconds, then format string would be "yyyy-MM-ddTHH:mm:ss.000K"

Answer 3

Get-Date supports Unix formatting strings with the -UFormat parameter. You can reuse it:

Get-Date -UFormat '+%Y-%m-%dT%H:%M:%S.000Z'