I believe YYYY-MM-DD is the international standard date notation (ISO 8601) http://www.cl.cam.ac.uk/~mgk25/iso-time.html http://www.cl.cam.ac.uk/~mgk25/iso-tim

I believe YYYY-MM-DD is the international standard date notation (ISO 8601) http://www.cl.cam.ac.uk/~mgk25/iso-time.html http://www.cl.cam.ac.uk/~mgk25/iso-time.html One point which makes me love this one is that it's "easily sortable and comparable", which is great when you have tons of files in a folder.