Vientiane is in Laos and is currently on UTC+7. Its time zone is Asia/Vientiane.
Vientiane does not observe daylight saving time. It stays on UTC+7 all year, so the difference to any other place that also holds a fixed offset never changes.
The weekend in Vientiane falls on Saturday and Sunday. A working day of 9:00 AM to 6:00 PM is the assumption used on the board.