time package - parsing of incorrect data

Hi all, I'm experimenting with time package parsing functionalities. I'm trying to verify what happens with inconsistent input data. From what I've seen, incorrect days are "truncated" while incorrect hours are left unmodified leading to inconsistent data. Is this the intended behaviour? Would it be more appropriate to return a parsing Error (Nothing in the following example)? with time-1.1.3:

parseTime defaultTimeLocale "%Y-%m-%d %H:%M" "2008-04-31 25:30" :: Maybe LocalTime Just 2008-04-30 25:30:00

Thanks Paolo