Thank you for your translation.
At first, I have to say "use piCal >= 0.502".
I have improved aroud locales.
New constants added.
define('_PICAL_LOCALE','en_US') ;
define('_PICAL_STRFFMT_DATE','%x') ;
define('_PICAL_FMT_MD','%2$s %1$s') ;
"events on the day" or "events after the day" uses _PICAL_FMT_MD.
'%2$s %1$s' means "day month"
'%1$s %2$s' means "month day"
Perhaps the LOCALE of dutch is 'dutch'.
If you finish translating, send it to me please.