Happy belated birthday — the world should give you a grace period anyway; you've earned one.
Late Birthday Wishes For Girlfriend
Even when your timing is a little off, a heartfelt late birthday wish can still melt her heart and remind your girlfriend just how deeply you cherish her. Our carefully chosen messages blend tenderness, romance, and sincerity so she feels truly celebrated. Pick one that speaks to you, personalize it, and send a postcard to create and send an e-card she’ll treasure long after her special day.
I'm sorry I was late. I'm not sorry I'm yours. Those balance out, hopefully.
Belated wishes — slower than the post, faster than my excuses, sincere as anything I've ever sent you.
Happy belated, my favorite missed deadline. The deadline is moved; the feelings haven't.
I missed the candles; I won't miss the year. Happy belated birthday — let's start over at dinner.