Shops are allowed to stay open until 22:00 from Monday to Saturday. Except in busy tourist areas, in or near railway stations, or for big box retailers such as Media Markt, most close at 18:00 on weekdays, and 17:00 on Saturdays, unlike Germany where retailers have taken fuller advantage of liberalization laws and most stay open till at least 19:30. Many supermarkets (including outlets of the market leader Albert Heijn, several DIY stores and IKEA) stay open until 20:00, 21:00 or 22:00. Most towns have their weekly shopping evening ("koopavond"), when shops stay open until 21:00, on Thursday or Friday. In touristic towns (like Amsterdam's city centre) supermarkets are allowed to open on Sundays between 07:00 and 22:00. Many towns have one or more supermarkets ("avondwinkels") that are open until later in the evening, occasionally all night. Convenience stores also have longer shopping hours; they are at many larger railway stations ("Albert Heijn to go") and in some busy streets.