生日邀请函就是邀请亲朋好友在自己生日那天出席所发出的信函，参加自己的生日宴会。
生日聚会宴会邀请函一
Dear friend,
I’m very happy,because my birthday will come next Saturday, And my family have many food and drink.I think a lot of funny things and we will paly them in that day.So I hope you can take part in.Now I will tell you the address of my house.It is in the central of our city named Funny Time. There are many trees and flowers around my home. Its wall is red and white.You must come.I’ll wite you.
生日聚会宴会邀请函二
亲爱的XX女士/男士
本月14号我要举行一个生日聚会，希望有空的小伙伴们到时准时参加，拒绝自带酒水及一切礼物，本人承担所有饮品蛋糕还有免费午餐，只求带来一颗诚挚的心吗，祝福我，谢谢!
时间：20XX年4月14日
地点：小南湖花园广场
期待你的光临!
生日聚会宴会邀请函三
亲亲：
19号是我家小丸子两周岁的生日，小丸子的妈妈提前来发邀请函了，希望得到你的祝福呢，来我家坐坐吧。妈妈准备了好吃的蛋糕呢。真的好希望可以把宝宝树的奖品送给宝宝做生日礼物，大家来为我加加油吧!