In general, a working week in Denmark is 37 hours divided between 5 days. Employees in Denmark are usually expected to complete the necessary amount of working hours from Monday to Friday between 06:00 and 18:00.
The question is, when do puppies open their eyes and start this process. The answer is somewhere between seven days to two weeks after birth. It varies a bit, based on breed and on the puppies themselves. When puppies open their eyes, this is just the first step in the beginning of other senses, including hearing.
Between two and four weeks old, puppies usually begin to growl, bite, wag their tails, and bark. Puppies develop very quickly during their first three months, particularly after their eyes and ears open and they are no longer completely dependent on their mother. Their coordination and strength improve, they spar with their littermates, and begin to explore the world outside the nest.