Most shops are open from 8 a.m. until 8 p.m. on weekdays and until 2 or 3 p.m. on Saturdays. Some shops work a split-shift system: from 8 a.m. to 12 p.m., and again from 4 p.m. to 8 p.m. Many shops stay open until 10 p.m., even on Sundays, especially in summer, while certain shops in the larger cities are open for business 24 hours a day. Public services and business offices work from 8 a.m. until 4 p.m., Mondays to Fridays.