DatetimeExamples.ps1

#$date = "02/15/2008" # Using a date in a leap year for fun
#$firstDayOfMonth = Get-Date ((((Get-Date $date).Month).ToString() + "/1/" + ((Get-Date $date).Year).ToString() + " 00:00:00"))
#$lastDayOfMonth = ((Get-Date ((((Get-Date $firstDayOfMonth).AddMonths(1)).Month).ToString() + "/1/" + (((Get-Date $firstDayOfMonth).AddMonths(1)).Year).ToString()))) - (New-TimeSpan -seconds 1)
#Write-Host ("-StartDate " + (Get-Date $firstDayOfMonth -format d) + " -EndDate " + (Get-Date $lastDayOfMonth -format d))


$LastDayOfMonth = (Get-Date -Year (Get-Date).Year -Month (Get-Date).Month -Day 1 -DisplayHint Date).AddMonths(1).AddDays(-1) 

Write-Host ($lastDayOfMonth).Date


#$DateDiff = New-TimeSpan $(Get-Date) $lastDayOfMonth
$DateDiff1 = New-TimeSpan $(Get-Date -month 9 -day 29 -year 2011) $lastDayOfMonth
$DateDiff2 = New-TimeSpan $(Get-Date -month 9 -day 28 -year 2011) $lastDayOfMonth
$DateDiff3 = New-TimeSpan $(Get-Date -month 9 -day 27 -year 2011) $lastDayOfMonth
$DateDiff4 = New-TimeSpan $(Get-Date -month 9 -day 26 -year 2011) $lastDayOfMonth

Write-Host ($DateDiff1).days "9-29-2011";
Write-Host ($DateDiff2).days "9-28-2011";
Write-Host ($DateDiff3).days "9-27-2011";
Write-Host ($DateDiff4).days "9-26-2011";
#Write-Host (Get-Date).DayofWeek

#if ( $diff.Days -eq 27 ) {
#	Write-Host "Found"
#	}
	
#if ( (Get-Date).DayOfWeek -eq 'Thursday' ) 	 {
#	Write-Host "It's Thursday!"
#}


#if ( ((Get-Date).Day -eq 1) -or ($DateDiff -eq 1) -or ($DateDiff -eq 2) ) {
#	Write-Host "The date is within two days of the end of the month or is the first of the month.";
#}

if ((Get-Date).Day -eq 1) {
	Write-Host "The first of the month.";
}

if (($DateDiff.days -eq '1')) {
	Write-Host "The date is within one day of the end of the month.";
}
elseif (($DateDiff.days -eq '2')) {
	Write-Host "The date is within two days of the end of the month.";
}
elseif (($DateDiff.days -eq '3')) {
	Write-Host "The date is within three days of the end of the month.";
}
elseif (($DateDiff.days -eq '4')) {
	Write-Host "The date is within four days of the end of the month.";
}