過咗對方生日日子先留言？可以咁寫： Wish you a belated happy birthday! 補祝你生日快樂！ ... 如果係留言俾唔太相熟嘅朋友，或者俾長輩，可以寫得簡單啲： Have a great ... ... <看更多>

(A person celebrating their birthday can be happy, but the date itself isn't happy). "Happy birthday," then, is just a concise well-wishing greeting, it means, ... ... <看更多>