Simple function to get the Nth ___day after a given date. Good for finding Patch Tuesday (2nd Tuesday of the month) or for scheduling your patches (pipelining, second Saturday after the second Tuesday of the month)

Get-NthDay.ps1

function Get-NthDay {
	[CmdletBinding()]

	Param(
		$Nth = 2,
		$Day = 'Tuesday',
		[Parameter(ValueFromPipeline = $true)]$StartDate = (Get-Date "00:00:00")
	)

	# Calculate the next 7*$Nth days worth of dates...
	# ...grab each one that is the weekday we're looking for...
	# ...and then grab the Nth-1 (proper arrays start at 0) of those days.  Poof, you have the Nth ___day of the month
	(0..(7 * $Nth) | Foreach-Object { (Get-Date $StartDate).AddDays($_) } | Where-Object { $_.dayofweek -eq $Day })[$Nth - 1]
}