Dates

##Dates
    <# Filtering AD Objects by Number of Days Ago #>
    $DaysAgo = (Get-Date)-(New-TimeSpan -Days 60)
    $DaysAgoConverted = $DaysAgo.ToFileTime()
    Get-ADComputer -LDAPFilter "(&(ObjectClass=User)(Lastlogontimestamp>=$DaysAgoConverted))" 

    (Get-Date '01/09/2022 12:00 PM')-(Get-Date)
    (Get-Date '01/09/2022 12:00 PM')-(New-TimeSpan -Days 180)
    [datetime]::fromfiletime(131002839181344055)

    #.Net format specifier; Output String Object
    # https://docs.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings?view=netframework-4.8
    Get-Date -Format "yyyyMMdd-HHmm"
        # 20210921-1210
    Get-Date -Format "yyyyMMddHHmm"
        # 202109211210
    Get-Date -Format "yyyy/MM/dd HH:mm `"(UTC`" K)"
        # 20210921-1209 (UTC -04:00)
    Get-Date -Format "yyyy/MM/dd HH:mm '(UTC'K)"
        # 20210921-1209 (UTC -04:00)
    Get-Date -Format "yyyy/MM/dd hh:mm:ss tt (UTC K)"
        # 2021/09/21 12:11:56 PM (UTC -04:00)

        # Version 7
        Get-Date -Format "yyyy/MM/dd hh:mm:ss tt (UTCK )" -AsUTC

    (Get-Date -Year 2020 -Month 12 -Day 31).DayOfYear
        # 366

    (Get-Date).IsDaylightSavingTime()
    (Get-Date).ToUniversalTime()

    (Get-Culture).DateTimeFormat