Display current time with time zone in PowerShell
While this is a bit ... naive perhaps, it's one way to get an abbreviation without a switch statement:
[Regex]::Replace([System.TimeZoneInfo]::Local.StandardName, '([A-Z])\w+\s*', '$1')My regular expression probably leaves something to be desired.
The output of the above for my time zone is EST. I did some looking as I wanted to see what the value would be for other GMT offset settings, but .NET doesn't seem to have very good links between DateTime and TimeZoneInfo, so I couldn't just programmatically run through them all to check. This might not work properly for some of the strings that come back for StandardName.
EDIT: I did some more investigation changing the time zone on my computer manually to check this and a TimeZoneInfo for GMT+12 looks like this:
PS> [TimeZoneInfo]::LocalId : UTC+12DisplayName : (GMT+12:00) Coordinated Universal Time+12StandardName : UTC+12DaylightName : UTC+12BaseUtcOffset : 12:00:00SupportsDaylightSavingTime : FalseWhich produces this result for my code:
PS> [Regex]::Replace([System.TimeZoneInfo]::Local.StandardName, '([A-Z])\w+\s*', '$1')U+12So, I guess you'd have to detect whether the StandardName appears to be a set of words or just offset designation because there's no standard name for it.
The less problematic ones outside the US appear to follow the three-word format:
PS> [TimeZoneInfo]::LocalId : Tokyo Standard TimeDisplayName : (GMT+09:00) Osaka, Sapporo, TokyoStandardName : Tokyo Standard TimeDaylightName : Tokyo Daylight TimeBaseUtcOffset : 09:00:00SupportsDaylightSavingTime : FalsePS> [Regex]::Replace([System.TimeZoneInfo]::Local.StandardName, '([A-Z])\w+\s*', '$1')TST
You should look into DateTime format strings. Although I'm not sure they can return a time zone short name, you can easily get an offset from UTC.
$formatteddate = "{0:h:mm:ss tt zzz}" -f (get-date)This returns:
8:00:34 AM -04:00