This is a description of type of laytime depending on the ordinary working hours of the colliery from which the coal will be delivered to the vessel. The working days are related to normal times and in rormal circumstances. Colliery holidays will be "holidays" if an exception to laytime exists in the charterparty (for example, "Sundays and Holidays excepted"). If the working in a colliery are on strike, the delay is not excepted form tha laytime, unless, of course, there is an appropriate "strike clause", unless a Sunday or holiday occurs during the strike.