Mass delete outlook calender events by subject

DeleteOutlookEvents.ps1

$eventSubject = "Subject of event" # replace me with another Subject
$olFolderCalendar = 9
$outlook = New-Object -ComObject Outlook.Application
$namespace = $outlook.GetNamespace('MAPI')
$calender = $namespace.GetDefaultFolder($olFolderCalendar) # 
$totalEvents = ($calender.Items | where { $_.Subject -eq  $eventSubject}).Count
if ($totalEvents) {
  (($calender.Items | where { $_.Subject -eq $eventSubject } )[1..$totalEvents]) | % { $_.Delete() }
}