Currently, we store a date string as the svn:date property on the revision. That date string is passed unchanged over the wire as DAV:creationdate. According to RFC 2518, that date must be an ISO-8601 date. In general, all of our date strings should be in the ISO-8601 format. See httpd-2.0/modules/dav/fs/repos.c::dav_format_time() for how to format the time from an APR time. This defect/bite-sized task involves creating a patch to APR-UTIL's date functions for parsing and formatting ISO-8601 dates (in a limited form; 8601 has a zillion variants). Those new functions can then be used throughout SVN when it needs to convert a time to a string and vice versa. (this is different from parsing user-supplied dates) (note: apr-util is not yet integrated into the SVN build, so any functions for parsing/formatting of dates can temporarily live in libsvn_subr until we move them to apr-util and start using apr-util) Marking as a P2 since we're violating RFC 2518. Noting this is a bite-sized task since it is pretty approachable to new developers.