Canonical facts from source: Provincial Mid-Autumn plan theme “Sắc màu Lâm Đồng - Chung một vầng trăng”. For the Đà Lạt / central Lâm Đồng area, UBND phường Xuân Hương - Đà Lạt hosts Đêm hội Trung thu at Quảng trường Lâm Viên and around Hồ Xuân Hương for children, residents, and visitors. Program expected to start at 18:00 on 24 September 2026 (14/8 lunar). Broader provincial festival window is 21–25 Sep 2026; this listing is only the Lâm Viên night. Security, traffic, fire, and food-safety measures are required for the festival period.