Simple function to add timespan

Add-TimeSpan.sp1

function Add-TimeSpan {
    [CmdLetBinding(DefaultParameterSetName='TimeSpan')]
    param(
        [Parameter()]
        [datetime]$Timestamp = (Get-Date),
        [Parameter(Mandatory,ParameterSetName='TimeSpan')]
        [timespan]$TimeSpan,
        [Parameter(ParameterSetName='TimeSlice')]
        [int]$Days,
        [Parameter(ParameterSetName='TimeSlice')]
        [int]$Hours,
        [Parameter(ParameterSetName='TimeSlice')]
        [int]$Minutes,
        [Parameter(ParameterSetName='TimeSlice')]
        [int]$Seconds
    )
    
    if ($PSCmdlet.ParameterSetName -eq 'TimeSlice') {
        $TimeSpanParam = @{}
        if ($Days -gt 0) {
            $TimeSpanParam.Add('Days',$Days)
        }
        if ($Hours -gt 0) {
            $TimeSpanParam.Add('Hours',$Hours)
        }
        if ($Minutes -gt 0) {
            $TimeSpanParam.Add('Minutes',$Minutes)
        }
        if ($Seconds -gt 0) {
            $TimeSpanParam.Add('Seconds',$Seconds)
        }
        $TimeSpan = New-TimeSpan @TimeSpanParam
    }
    $Timestamp + $TimeSpan
}

Usage.md

Usage

Dot-source the Add-TimeSpan.sp1 file or add the contents to your $PROFILE.

Add-TimeSpan -Minutes 5

Wednesday, August 10, 2022 3:11:07 AM

Add-TimeSpan -Timestamp '01/01/2022 7:45 PM' -Days 15

Sunday, January 16, 2022 7:45:00 PM

Add-TimeSpan -TimeSpan (New-TimeSpan -Minutes 5 -Hours 10 -Seconds 16)

Wednesday, August 10, 2022 1:14:23 PM