Get-Week.ps1
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#author: Stephan Graf #date: 2021-05-28 #Inspiration: https://devblogs.microsoft.com/scripting/use-powershell-to-get-the-number-of-the-week-of-the-year/ #https://stackoverflow.com/a/61960610/8035636 #beware that Week 53 is possible since a year actually has 52.14 Weeks! #todo: -toint() function Get-Week(){ [CmdletBinding()] param( [Parameter(ValueFromPipeline)]$date=(get-date), [Parameter()]$cultureName="de-CH" ) $midnight=get-date -hour 0 -minute 0 -second 0 -Millisecond 000 $monday=$midnight.AddDays(1 - $date.DayOfWeek.value__) $sunday=(get-date $monday -hour 23 -Minute 59 -Second 59 -Millisecond 999).AddDays(6) if((get-host).version.Major -lt 7){ $culture=get-culture Write-Warning "Cannot get culture '$cultureName'. Please upgrade to powershell7. Continuing with $culture." # warning, if system is different culture than de-CH it will give wrong number! }else{ $culture=get-culture -name $cultureName } Write-Verbose "Culture: $culture" $number= "{0:d1}" -f ($culture.Calendar.GetWeekOfYear($date,[System.Globalization.CalendarWeekRule]::FirstFourDayWeek, [DayOfWeek]::Monday)) $week=[PSCustomObject]@{ PSTypeName="Week" number=[Int32]$number start=$monday end=$sunday } Update-TypeData -TypeName "Week" -DefaultDisplayPropertySet "number" -force return $week } function Step-Week{ [CmdletBinding()] param( [Parameter(ValueFromPipeline)]$date=(get-date) ) return get-week -Date $date.AddDays(7) } |