Coming to Quang Ninh in spring, you can take part in Yen Tu Festival which takes place annually from 10th of the first lunar month to March of lunar year in Uong Bi town. Yen Tu is considered the center of Buddhism of Dai Viet country (ancient Vietnam) in the past.
Long Tien Pagoda Festival is another spiritually meaningful festival which takes place annually on 24th of March lunar year under the Bai Tho Mountain, Ha Long city. Long Tien Pagoda was constructed not very long ago, and it is the largest pagoda in Ha Long city.
Tra Co Village Festival is organized from end of May to the beginning of June in Mong Cai town to worship the six tutelary gods and Nguyen Huu Cau (Quan He), a farmer leader under the Le-Trinh Dynasty.
Cua Ong Temple Festival in Cam Pha often takes place from January to March of lunar month (the main festival day is March 2nd).
From 10th to 20th of lunar June, you can visit Quan Lan in Van Don archipelago to take part in QuanLan Temple Festival.