The official operating hours for most retail shops and shopping centres in KL are from 10.00 am to 10.00 pm. Government offices operate from 8.00 am to 4.30 pm on weekdays only. Banking hours are from 9.15 am to 4.30 pm on Mondays to Fridays and post offices open from 8.30 am to 5.30 pm on Mondays to Saturdays.
On the contrary, KL is famous for its round-the-clock eating time, hence you'll see many eateries are open for 24 hours a day, 7 days a week. In some parts of KL, street side shopping happens from 3.00 pm untill midnight.