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# ->clean()
 -  returns null if not required
# validate strtotime formats
 -  accepts dates parsable by strtotime
 -  accepts dates parsable by strtotime
 -  throws a sfValidatorError if the date is a string and is not parsable by strtotime
 -  throws a sfValidatorError
# validate timestamp
 -  accepts timestamps as input
# validate date array
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  recognises a leapyear
 -  throws a sfValidatorError if the date is not valid
 -  throws a sfValidatorError
 -  throws a sfValidatorError if the date is not valid
 -  throws a sfValidatorError
 -  throws a sfValidatorError if the date is not valid
 -  throws a sfValidatorError
# validate regex
 -  accepts a regular expression to match dates
 -  accepts a regular expression when cleaning an array
 -  throws a sfValidatorError if the date does not match the regex
 -  returns the expected date format in the error message
 -  throws a sfValidatorError
 -  returns the expected date format error if provided
# option with_time
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  accepts an array as an input
 -  throws a sfValidatorError if the time is not valid
 -  can accept date time with the with_time option
 -  can accept date time with the with_time option
 -  can accept date time with the with_time option
 -  can accept date time with the with_time option
# change date output
 -  output format can be change with the date_output option
 -  output format can be change with the date_output option
 -  throws an exception if the date is empty and required is true
 -  throws an exception if the date is empty and required is true
 -  throws an exception if the date is empty and required is true
 -  throws an exception if the date is empty and required is true
# max and min options
 -  can accept a max/min option
 -  throws an exception if the date is not within the range provided by the min/max options
 -  throws an exception if the date is not within the range provided by the min/max options
# max and min options out off timestamp range
 -  can accept a max/min option string
 -  can accept a max/min option array
 -  throws an exception if the date is not within the range provided by the min/max options
 -  check exception message
 -  throws an exception if the date is not within the range provided by the min/max options
 -  check exception message
 -  respects incoming and default timezones
# Looks like everything went fine.