Convert-TimeZone.ps1
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<#
.SYNOPSIS Convert a DateTime object from one timezone to another. .DESCRIPTION Convert a DateTime object from one timezone to another. List valid time zone identifiers. [System.TimeZoneInfo]::GetSystemTimeZones().id .PARAMETER inputDateTime Enter a valid datetime object. .PARAMETER fromTimeZone Enter a valid timezone identifer. .PARAMETER toTimeZone Enter a valid timezone identifer. .EXAMPLE Convert-TimeZone -inputDateTime '7/20/2017 5:00 PM' -fromTimeZone 'UTC' -toTimeZone 'Eastern Standard Time' Thursday, July 20, 2017 1:00:00 PM .NOTES Created by: Jason Wasser @wasserja Modified: 7/26/2017 10:26:52 AM #> function Convert-TimeZone { [CmdletBinding()] param ( [datetime]$inputDateTime = (Get-Date -Format 'yyyy-MM-dd HH:mm:ss'), [string]$fromTimeZone = "E. Europe Standard Time", [string]$toTimeZone = [System.TimeZoneInfo]::Local.Id ) begin { function Test-TimeZone { param ( $TimeZone ) $ValidTimeZones = [System.TimeZoneInfo]::GetSystemTimeZones() Write-Verbose -Message "Validating time zone $TimeZone" # $IsValidTimeZone = $ValidTimeZones.id -contains $TimeZone $IsValidTimeZone = ($ValidTimeZones | Select-Object -ExpandProperty Id) -contains $TimeZone Write-Verbose -Message "Timezone $TimeZone is $IsValidTimeZone" $IsValidTimeZone } } process { # Validate time zones if ((Test-TimeZone -TimeZone $fromTimeZone) -and (Test-TimeZone -TimeZone $toTimeZone)) { Write-Verbose -Message "Timezones have been validated." Write-Verbose -Message "Converting $inputDateTime from $fromTimeZone to $toTimeZone" $outputDateTime = [System.TimeZoneInfo]::ConvertTimeBySystemTimeZoneId( $inputDateTime, $fromTimeZone, $toTimeZone) Write-Output $outputDateTime } else { Write-Error "Invalid time zone entered." } } end { } } |