This weekend I translated to Dutch ( belgium)

The question is, can I translate the AB_FIELD_***** values?
# these need to be kept in sync with ZmContact.F_*
AB_FIELD_firstName = First

Second question:in the file, is it allowed to change these Cal values?
and what does EEE and EEEE mean?
# formats for calendar use
formatCalDate = EEE, MMM d
formatCalDateLong = EEEE, MMMM d
formatCalDateFull = EEEE, MMMM d, yyyy
formatCalDay = M/d
formatCalMonth = MMMM yyyy
# additional formats for date formatting
formatDateMediumNoYear = MMM dd

Tomorrow I will fax the Zimbra contributor agreement, do I also have to send it then by regular mail?