Mastering Windows PowerShell Scripting - Third Edition

Changing dates

A date object can be changed in a number of ways.

A Timespan object can be added to or subtracted from a date:

(Get-Date) + (New-Timespan -Hours 6) 

The Date property can be used, representing the start of the day:

(Get-Date).Date 

The Add<Interval> methods can be used to add and subtract time, as follows:

(Get-Date).AddDays(1)  # One day from now 
(Get-Date).AddDays(-1) # One day before now 

In addition to AddDays, the DateTime object makes the following available:

(Get-Date).AddTicks(1) 
(Get-Date).AddMilliseconds(1) 
(Get-Date).AddSeconds(1) 
(Get-Date).AddMinutes(1) 
(Get-Date).AddHours(1) 
(Get-Date).AddMonths(1) 
(Get-Date).AddYears(1) 

By default, dates returned by Get-Date are local (that is, within the context of the current ...