Patch Tuesday

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November 14

Patch Tuesday – the second Tuesday in the month – is the day Microsoft (and other vendors) release their patches. If you want to be able to plan ahead for these dates ( like arranging holiday or sick leave ) these two functions will supply the dates to look out for.

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 function get-secondTuesday {
param([datetime]$date)
    switch ($date.DayOfWeek){
        "Sunday"    {$patchTuesday = $date.AddDays(9); break} 
        "Monday"    {$patchTuesday = $date.AddDays(8); break} 
        "Tuesday"   {$patchTuesday = $date.AddDays(7); break} 
        "Wednesday" {$patchTuesday = $date.AddDays(13); break} 
        "Thursday"  {$patchTuesday = $date.AddDays(12); break} 
        "Friday"    {$patchTuesday = $date.AddDays(11); break} 
        "Saturday"  {$patchTuesday = $date.AddDays(10); break} 
     }
     $patchTuesday.ToLongDateString()
}

function Get-PatchTuesday {
param (
    [parameter(ValueFromPipeline=$true)]
    [int]$year = (Get-Date).Year,
    
    [switch]$nextmonth
    )
     
    if ($nextmonth){
        $now = Get-Date
        $d = Get-Date -Day 1 -Month $($now.Month + 1) -Year $now.Year
        get-secondTuesday $d
    }
    else {
        1..12 | foreach {
            $d = [datetime]"$_/1/$year"
            get-secondTuesday $d
        }    
    }
} 

Get-PatchTuesday takes a year (default is current year) and works out the first of each month as a date. This is passed to get-secondtuesday to calculate the date the patches will be released.

If the –nextmonth parameter is used then the first of next month is calculated and the patch date for that month retrieved from getsecondtuesday.

Dates for the next few months are

08 December 2009
12 January 2010
09 February 2010
09 March 2010
13 April 2010
11 May 2010
08 June 2010
13 July 2010
10 August 2010
14 September 2010
12 October 2010
09 November 2010
14 December 2010

Time to start planning.

These functions can be adapted to provide dates for any date that follows the pattern of nth weekday.

Technorati Tags: PowerShell,dates,patch Tuesday

8:14 PM | Blog it | Powershell

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