How do you say Have a nice day in Cantonese?

In Cantonese, "Have a nice day" is expressed as "祝你有美好的一天" (juk1 nei5 jau5 mei5 hou2 dik1 jat1 tin1). This phrase conveys a warm wish for someone to enjoy their day. You can also simply say "祝你開心" (juk1 nei5 hoi1 sam1), which means "wish you happiness."