This day is holiday, in memory of Pathet Lao
The Pathet Lao (ປະເທດລາວ, "Lao Nation") was a communist political movement and organization in Laos, formed in the mid-20th century. The group was ultimately successful in assuming political power after the Laotian Civil War. The Pathet Lao were always closely associated with Vietnamese communists. During the civil war, it was effectively organized, equipped and even led by the army of North Vietnam.
The Pathet Lao were the Laotian equivalent of North Vietnam’s Vietnam People’s Army, South Vietnam’s Viet Minh and later Viet Cong, and Cambodia’s Khmer Rouge. Eventually, the term became the generic name for Laotian communists.
The political movement of the Pathet Lao was called first the Lao People’s Party (1955–1972) and later the Lao People’s Revolutionary Party (1972–present).
Key Pathet Lao leaders include Prince Souphanouvong, Kaysone Phomvihane, Phoumi Vongvichit, Nouhak Phoumsavanh and Khamtay Siphandone.