PSDates provides you all the tools you need when working with dates and times in PowerShell. It contains function to help you find specific date formats, get certain dates based on other dates (first/last day of the month or year, patch Tuesday, etc). I also has functions for working with timezones, unix time, WMI time, crontabs.

This PowerShell module is ideal for planning, scheduling, and IT operations, enabling users to find the first and last days of a month, any variation of the nth instance, or nth last instance of a particular DayOfWeek in a month, including Patch Tuesday.