The 63rd article of labor law 4857 states that the weekly working period is 45 hours, and unless otherwise stated this period will be prorated on the working days. According to this article, the daily working period for an employee who works 6 days a week will be 7.5 hours. In SSK processes 1 month is considered 30 days, so the monthly working period is 30x7.5=225 hours.