function Test-LeapYear {
    param( [int]$year )
    # This could be solved using the native system.datetime object
    # but that isn't in the spirit of exercism. 
    #[system.datetime]::isleapyear($year)
    
    # Instead solve using math
    if ( $year % 4 -eq 0 -and $year % 100 -ne 0 -or $year % 400 -eq 0) {
        return $True
    }
    else {
        return $False
    }
}