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.
The kittens' eyes will begin to open around 7-10 days of age. Do not pry open the lids for any reason, as the immature eye is not yet ready to handle light. Some kittens will take a day to open the eyes while others will take 3-4 days. The retina matures around 5 weeks of age and the kitten sees clearly.