What do you mean it's sunny and you can't forget to go home?

It means that on a sunny holiday like Tomb-Sweeping Day, although it is tempting to go out to play, don't forget to go home. This sentence expresses the author's respect for traditional festivals and families, reminding people to cherish time and return to their families, and not to forget their families and responsibilities because of their short play. This is also the embodiment of traditional cultural values. "Wan Li can't forget to go home in a clear sky" comes from Du Mu's poem Qingming in the Tang Dynasty.