Time zone UTC+7  ( UTC+7 )  - Summer ( DST ) No DST ( UTC+7 ) Website www.hanoi.gov.vn Hanoi seen from Spot Satellite Hanoi  ( Vietnamese : Hà Nội), estimated population nearly 6.5 million (2009), [1]  is the  capital  and second-largest city of  Vietnam . From 1010 until 1802, it was