You missed prepositions 'de' in your format string, also for months' names is used MMMM not mmmm, furthermore, aaa means AM or PM, not 'a.m.' or 'p.m.'
Yes, It's unparseable because that format is for CET times... as I said you, there's no way to parse a.m. or p.m. that's not a valid format, it must be AM or PM.