Get-MrDayLightSavingTime.ps1
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#Requires -Version 3.0 function Get-MrDayLightSavingTime { <# .SYNOPSIS Returns the beginning and ending date for daylight saving time. .DESCRIPTION Get-MrDayLightSavingTime is a function that returns the dates when daylight saving time begins and ends for the specified year. .PARAMETER Year The year to return the daylight saving time dates for. The year cannot be earlier than 2007 because the dates were in April and October instead of March and November prior to that year. The default is the current year. .EXAMPLE Get-MrDayLightSavingTime .EXAMPLE Get-MrDayLightSavingTime -Year 2014, 2015 .EXAMPLE Get-MrDayLightSavingTime -Year (2011..2020) .EXAMPLE 2014, 2015 | Get-MrDayLightSavingTime .EXAMPLE 2011..2020 | Get-MrDayLightSavingTime .INPUTS Integer .OUTPUTS PSCustomObject .NOTES Written by Mike F Robbins Blog: http://mikefrobbins.com Twitter: @mikefrobbins #> [CmdletBinding()] param ( [Parameter(ValueFromPipeline)] [ValidateRange(2007,9999)] [Int[]]$Year = (Get-Date).Year ) PROCESS { foreach ($y in $Year) { [datetime]$beginDate = "March 1, $y" while ($beginDate.DayOfWeek -ne 'Sunday') { $beginDate = $beginDate.AddDays(1) } [datetime]$endDate = "November 1, $y" while ($endDate.DayOfWeek -ne 'Sunday') { $endDate = $endDate.AddDays(1) } [PSCustomObject]@{ 'Year' = $y 'BeginDate' = $($beginDate.AddDays(7).AddHours(2)) 'EndDate' = $($endDate.AddHours(2)) } } } } |