unbirthday

adj.<谑>(礼物等)非生日当天送的,非生日那一天的

非生日；非生日派对；不是生日的日子

名词

1. They decided to throw an unbirthday party for their friend who has a summer birthday.
他们决定为夏天生日的朋友举办一个非生日派对。
2. Every day is an unbirthday for those who celebrate them just as joyfully as their actual birthdays.
对于那些像庆祝真正生日一样欢庆非生日的人来说，每一天都是一个非生日。