as said, just remember the good times
My dad passed away 7 years ago a few months after my 21st but I struggle to remember the date. I try not to think about his death day but instead remember all the good times and especially his birthday.
Life baffles me, he was 47 and had type 1 diabetes. He looked after himself very very well because of this and was a lot fitter than me
Yet he died and one of his brothers who smokes like a chimney, does no exercise etc (he has type 1 diabetes too) and generally does nothing to help himself, is still going past 50.