The International Day of Older Persons on October 1 was established in 1990 by UN Resolution 45/106. Learn its origin, meaning, and how Vietnam observes it.
Updated 22 Jul 2026Culture and belief
Knowledge › Vietnam › Vietnamese commemorative days
Lady Trieu, born Triệu Thị Trinh in 226, led the 248 uprising against Wu rule. Her temple on Gai Mountain, Thanh Hóa, keeps national heritage festivals.
Dinh Thầy Thím Festival runs from the 14th to the 16th of the Ninth Lunar Month with spirit welcoming, cộ bánh offerings, Thỉnh sanh, and Tiền hiền rites.
The Tây Thiên Festival runs from the 15th to the 17th of the second lunar month in Đại Đình Commune, Phú Thọ Province, honoring National Mother Lăng Thị Tiêu.
The death anniversary of Lễ Thành Hau Nguyễn Hữu Cảnh honors the pioneer of Southern Vietnam, a ritual named a National Intangible Cultural Heritage in 2025.
World Environment Day on June 5 was designated by the UN General Assembly in 1972 and is led by UNEP. Learn about its history, purpose and significance.
Kathina, the Khmer Theravada robe offering after the three-month rain retreat, runs from the 16th of the ninth lunar month to the full moon of the tenth.
Thu Phân, the 16th of the 24 solar terms, begins on 22 to 24 September as the Sun enters the Thọ Tinh station. Its calendar roots and customs, explained.
Cổ Lễ Pagoda (Ong) Festival, Ninh Bình: 13th to 16th of the 9th lunar month, main day the 14th. In 2026 that is 22 to 25 October; in 2027, 12 to 15 October.
Dinh Cậu Phú Quốc Festival falls on the 15th and 16th of the 10th lunar month, with Nghinh Cậu, Yết Cậu and Chinh Te rituals honouring Chúa Ngọc Nương Nương.
The Khao Le The Linh Hoang Sa ceremony on Lý Sơn, Quảng Ngãi honours Hoang Sa soldiers with orations and model boats set adrift before Tứ Linh boat races.
Huyền Trân Princess Temple in Hue honors the Tran dynasty princess who expanded Vietnam's southern frontier. Its festival falls in the first lunar month.
Chairman of the Board of Directors of Truong Hai Group (THACO), a pioneering entrepreneur in the field of automobile manufacturing and assembly in Vietnam