Always save the best for last, even if being last means your birthday greeting arrives a little later than intended.
I didn’t intend on being the last one; it was just one of those things that sort of happens without you really being able to explain it. Well, maybe a good way of putting it would be to simply say that I forgot and I am so sorry for not sending you these birthday wishes on time.
The timing may have been off, but the surprise factor was still there and you should really focus on the positive side.
Had I known forgetting your birthday would’ve caused so much trouble I’d have tried harder to remember it! I definitely won’t miss another one, that’s for sure!
Of course, had you thrown a big party on the actual day and invited me, I would have wished you a happy birthday there and then... But, as you didn’t, I’m wishing you a late happy birthday instead!
I wasn’t sure how to wish you a belated happy birthday, but I thought it would probably be best to start off by apologising for missing the actual day!
Sorry for the late wishes, I hope you can forgive me! Happy belated birthday!