This thread is to explain the meaning of festivals and ceremonies in Vietnam as they happen.
Beginning with today, July 15 on the lunar calendar, the annual ceremonial day called Lễ Vu Lan. It's one of the few major days in Buddhism to honor and show filial piety to one's parents and grandparents (living and deceased).
It's also a day to bring offerings to the poor and hungry souls (on this and other realms) and to give freedom to caught /caged animals as almsgiving to dedicate merit and karma to one's parents. (I'm keeping my goldfish however; they would be dead in the wild without daily food and clean water, releasing them would be the opposite of almsgiving)
You'll see fish and birds being released, meals being offered at Buddhist temples, and trays of food and fruits in front of individual homes. You're welcome to take your meals at temples, but don't take food from the offering in front of people's houses as those are mostly for the departed souls.