HSBC and Hang Seng Bank may open some of their branches on Sundays after they introduce a five-day working week. William Leung Wing-cheung, Hang Seng Bank's general manager for personal financial services and wealth management, said the bank would launch a pilot scheme to gauge any change in demand for banking services after the government introduces a shorter working week for civil servants in July. 'I am not ruling out some branches may be opened on Sundays under the pilot scheme,' Mr Leung said. The Hong Kong Association of Banks decided last month to switch clearing services to a five-day week from September 4. HSBC has said it will switch to a five-day working week on that date. Hang Seng Bank has said it will announce a timetable later. Mr Leung said he expected a final decision to be made in October. He said Hang Seng Bank would continue to provide banking services on Saturdays in September before any decision was made. HSBC executive director Peter Wong Tung-shun said his bank was also studying various options, including whether to open its branches on Sundays, but no decision had been made. Chief executive Michael Smith said he expected a decision before September. Only branches at shopping malls would be considered for seven-day opening, he said. Stanley Wong Yuen-fai, director and deputy general manager of ICBC (Asia), expected banks to open some branches on Saturdays and Sundays when five-day working came in. 'But the branches will mainly focus on sales services such as marketing credit card and wealth management products.' Separately, Nancy Chan, deputy general manager of Bank of Communications' Hong Kong branch, said the bank would retain Saturday services after September.