Convert Between Time Zones

$DateTime = [DateTime]::SpecifyKind($date, [DateTimeKind]::Unspecified)
$from = [System.TimeZoneInfo]::FindSystemTimeZoneById($FromTimeZone)
$to = [System.TimeZoneInfo]::FindSystemTimeZoneById($ToTimeZone)
$utc = [System.TimeZoneInfo]::ConvertTimeToUtc($DateTime, $from)
[System.TimeZoneInfo]::ConvertTime($utc, $to)
Details
Convert from one Time Zone to another.

Example
PS C:\> $Date = Get-Date '3/28/2019 10:35 AM'
>> $FromTimeZone = 'Central Standard Time'
>> $ToTimeZone = 'US Mountain Standard Time'
>> $DateTime = [DateTime]::SpecifyKind($date, [DateTimeKind]::Unspecified)
>> $from = [System.TimeZoneInfo]::FindSystemTimeZoneById($FromTimeZone)
>> $to = [System.TimeZoneInfo]::FindSystemTimeZoneById($ToTimeZone)
>> $utc = [System.TimeZoneInfo]::ConvertTimeToUtc($DateTime, $from)
>> [System.TimeZoneInfo]::ConvertTime($utc, $to)


Thursday, March 28, 2019 8:35:00 AM