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.
They will continue to open further until somewhere between two and three weeks of age, at which point they will be open completely. A kitten's ears will also open about this time, but her eyes do open first, meaning that she will begin to develop first her sense of sight during these first few weeks of life.