Bus and train schedules are covered with a bunch of strange symbols. What are they?

The crossed hammers indicate that the bus or train runs only on working days, while a cross indicates that it runs on Sundays and national holidays. Days of the week are sometimes designated by numbers – 1 = Monday, 2 = Tuesday, etc. Czechs also use the terms “day of labor freedom” (den pracovního volna) for Saturdays – because under communism Saturdays often turned into work days – and “day of labor rest” (den pracovního klidu) for Sundays and holidays.