Time in Lang Son, Vietnam 10:30 AMThursday, February 21, 2019 Lang Son time zone: UTC+07:00 or +07 Daylight saving time (DST) changes in Lang Son No daylight saving time (DST) in Lang Son. Sunrise and sunset time for Lang Son Sunrise: 6:20 6:20 AM Sunset: 17:53 5:53 PM Day length: 11h 33m 6s Solar noon: 12:06 12:06 PM See the monthly sunrise, sunset, and twilight table for Lang Son Lang Son weather Freemeteo.com: Lang Son weather Lang Son, Vietnam: basic facts and figures Country: Vietnam Lang Son coordinates: 21°51′09″ N, 106°45′39″ E Population: 55,981 Wikipedia article: Lang Son