Adds String#valid_date? and String#valid_time? methods to add utility to the Rails String#to_date and String#to_time methods. Determines whether the string contains a valid date or time, to check before converting to a date and avoiding an exception.

Examples:

    "2008-01-01".valid_date?          #=> true
    "20080101".valid_date?            #=> true
    "0000-00-00".valid_date?          #=> false
    "".valid_date?                    #=> nil
    
    "2008-01-01".valid_time?          #=> true
    "20080101".valid_time?            #=> true
    "2008-01-01 12:00".valid_time     #=> true
    "2008-01-01 52:99".valid_time     #=> false
    "0000-00-00".valid_time?          #=> false
    "".valid_time?                    #=> nil
    
    

This gem is released under a broad open-source license. See LICENSE for more details.