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.
Their eyes will open within 5-10 days but don't open fully for another 2-3 days. All kittens eyes are blue and will remain so until 12 weeks old (very much like babies) when they will develop their true colour, although some breeds do not change colour fully until 12 months of age.