You can still eat the steamed egg custard at noon in the evening, but there is no need to reheat it. However, as for general food, especially eggs, try not to eat it after the night, as it may Breeds bacteria. This is not good for the body. You said that the time interval is not very long, so it should not matter. Just don't give it to children, because children's intestines and stomachs are relatively weak, and adults' intestines and stomachs are better, so adults should be able to eat it.