Using the international standardized ISO 8601 format is recommended for all international audiences. It has the additional advantage that it sorts nicely under every condition. YYYY-MM-DD
Since MSFT changed the MSDN portal it isn't accessible for non subscribers, so @whatever127 extracts the info from MVS, to have them available for everybody. The MVS dumps contain the checksums and MVS filenames to check them against what you downloaded, to verify the ISO/EXE file's integrity.