Answers (1)
Marsh
there are many outlets with cards for belated birthdays, it is a start, you could say your sorry for not remembering or that you did and were held up with other situations that neded urgent timing and literally forgot as you were involved with an alternative situation.
You could arrange an alternative birthday and gifts, a perfect breakfast at a local eatery, lunch with a cup cake to celebrate, forget about guilt at forgetting etc but deciding on how you can make an alternative rememberance.