The calendar, which detailed other international festivals, such as the Chinese, Islamic and Jewish new years, as well as St Andrew's Day and St George's Day, featured on a leaflet outlining local leisure services.

The council apologised to residents for failing to include the Welsh patron saint's day and has ended its contract with Leisure Information Services.

A spokesperson for the company told printweek.com: "We were given a file to print and we printed it", but declined to comment further.

Gareth Jones, Ceredigion council's director of education, told printweek.com the printer supplied a "blueprint" of what it could produce, which "made it even more confusing" when the calendars arrived.

He added that "it was too early" for the council to decide on a new printer to carry out the work in future.

A council spokesperson said: "We checked other directories produced by the company and St David's Day has been listed in all. This is indeed an error."