In Ho Chi Minh City, Nguyen Hue Flower Street, which opened on February 15, was packed with residents and tourists ahead of midnight.
Families gathered at Ben Thanh Market and Bach Dang Wharf from late afternoon to secure vantage points for the fireworks.
By early evening, crowds had also converged around Hoan Kiem Lake in Hanoi.
Traditional calligraphers lined the streets, attracting visitors seeking New Year characters.
In Can Tho, streets grew busy from 8 pm, with the Spring Flower Street on Vo Van Tan among the main draws.
An artistic programme was staged at Song Hau Park in Can Tho.
In Danang, people gathered at 24/3 Square, where a horse-themed installation drew families for photographs.
Similar scenes unfolded in Hoi An, where tourists queued for boat rides and lantern releases on the Hoai River.
In Dalat, a New Year’s Eve concert was held at Lam Vien Square in cool, dry weather.
In Ho Chi Minh City, Hospital 115 said its emergency department was treating about 120 patients by late evening, including stroke, cardiac and trauma cases. Hanoi deployed emergency teams to fireworks sites, while fire and rescue forces maintained full staffing overnight.
Police in Danang stepped up patrols in major public spaces.
