Issued today in 1977

Guyana. Festival of Arts and Culture. Issued 1 February 1977.

The 2nd World Black and African Festival of Arts and Culture was originally scheduled to be held from 22 November to 20 December 1975 in Nigeria, but the event was postponed by the Federal Military Government due to lack of facilities. The event eventually took place between 15 January and 12 February 1977.

Stamps for the original 1975 event were prepared for issue in Guyana, but were withheld and overprinted before being released  1 February 1977. A small number of stamps and miniature sheets exist missing the obliteration bar and overprint.

Examples can be seen here.