Yes. But it must be stored properly and not soaked in water to prevent it from deteriorating. It can be stored in the refrigerator.

It is better and fresher if the food is freshly cooked and eaten. If it is something like rice dumplings, the shelf life is longer than other fruits and vegetables. If you want to make it in advance, generally keep it in the refrigerator for no more than three days. If it exceeds three days, it is best to freeze it. Of course, the freezing time should not exceed one week.

Extended information:

Zongzi originated as a sacrifice to the dragon or Wu Zixu during the Dragon Boat Festival. Later, the Chu people threw the body of Qu Yuan into the river to prevent it from being eaten by shrimps, crabs and fish. , and threw rice dumplings into the river to feed the fish. Another theory is that rice dumplings are directly used to worship Qu Yuan’s deceased soul.

It has a long history. During the Spring and Autumn Period, millet rice was wrapped in white leaves of mushrooms and wild rice into horn shape, which was called "horn millet"; rice was packed in bamboo tubes and sealed and roasted, which was called "tube rice dumplings".

In addition to commemorating Qu Yuan, Zongzi is considered to be related to Wu Zixu’s belief in Jiangsu and other places. "Records of the Years of Jingchu": "It was a day of racing, and it was also the custom of the Eastern Wu Dynasty. The matter was Zixu's, not Qu Ping's." "Suzhou Fu Zhi" added: "It is a local custom to serve rice dumplings to the doctor at noon. Not Qu Yuan”

Baidu Encyclopedia-Zongzi