From Jun till end of the year we will have 1 more holiday. It is National holiday occuring on Sept 2nd 2020.
National Day is a national holiday in Vietnam observed on 2 September, commemorating President Hồ Chí Minh reading the Declarations of independence of Vietnam at Ba Đình Square in Hanoi on 2 September 1945. It is the country's National Day.
Here is the wiki article for the historian buffs out there.