Public service employees in Guernsey will strike on Wednesday 29 May.
In a statement to ITV Channel TV, Unite union representatives say their members will take part in the industrial action over pay.
Employees expected to strike include cleaners, waste porters and sewage workers.
Staff at the airport and hospital are also expected to strike but these locations are not likely to experience disruptions to their normal service.
The States of Guernsey say they are looking at all options to avert the industrial action and resume negotiations.