The 21st Cannes Film Festival was to have been held from 10 to 24 May 1968, before being curtailled due to the turmoil of May 1968 in France.

The Long Day's Dying is a 1968 British Techniscope war film directed by Peter Collinson, and starring David Hemmings, Tony Beckley and Tom Bell. It is based on the 1962 novel of the same name by Alan White.