Most places adhere to the following hours. Shopping centres generally have longer hours and are open from 9am to 8pm on Saturday and Sunday. Museums are usually closed on Mondays, and have shorter hours outside of the high season.
Banks 9am-4pm Mon-Fri, 9am-1pm Sat (varies)
Offices 9am-5pm Mon-Fri, 9am-1pm Sat (varies)
Post Offices 8am-7pm Mon-Fri, 8am-1pm Sat (cities)