#Script créé par Nicolas Lang - Sous licence CC-BY-SA
#https://nicolaslang.fr

$today = Get-Date
$cible = [datetime]"12/16/2016"

$feries = @([datetime]"01/01",[datetime]"05/01",[datetime]"05/08",[datetime]"07/14",[datetime]"08/15",[datetime]"11/1",[datetime]"11/11",[datetime]"12/25")
$feries += @([datetime]"04/21/2014",[datetime]"05/29/2014",[datetime]"06/09/2014",[datetime]"04/06/2015",[datetime]"05/14/2015",[datetime]"05/25/2015")
#ajoutez les jours qui sont fériés en conservant cette syntaxe
$joursouvres = 1
 while ($today.ToLongDateString() -ne $cible.ToLongDateString())
 {
 if (($today.DayOfWeek -ne "Sunday") -and ($today.DayOfWeek -ne "Saturday") -and ($feries.tolongdatestring() -notcontains $today.tolongdatestring()))
  {
  $joursouvres++
  }#fin if
  $today = $today.AddDays(1)
 }#fin while
 Write-Host $joursouvres "jour(s) ouvré(s), aujourd'hui inclus"