At the University, the regular working hours run from 8:45 a.m. to 5:00 p.m., but in the summer, the hours go from 8:45 a.m. to 4:00 p.m., a one-hour reduction per day. The summer hours start the 1st of June and ends the 31st of August, a period of 3 months.
In other words, the total annual average working time is 35 hours per week or 1,820 hours per year. In summer, during those three months, the week lasts 31.25 hours while it lasts 36.25 hours the rest of the year.
Most employees enjoy this benefit in one form or another, but your exact working hours may be different, considering many factors.