As Mom has gotten more frail, I realized I can't rely on her anymore to remind me about birthdays, and she couldn't remember years at all (neither could I.) So I typed out a list of birthdays and anniversaries for all of our surviving family members. I called and emailed everyone whose dates I didn't have, then mailed and emailed the list to everyone. So now there won't be a need to wonder when this one was born or how old that grandchild is. And it won't be crucial to transfer dates to the calendar.
I have kept a list for years and it has been a life saver. This year for Christmas, my BIL put together calenders with everything marked on the appropriate day for everyone. Each family was printed in a different color, it was a really neat thing. So when January is up, I can see who is having a birthday or anniversary and which family they are a part of.
That was really nice of you to take the initiative to do that.
The only birthdays I acknowledge (other than grandchildren and children) is my sibs and my husband sibs. I just write the birthdays of my family in my calendar every year. My dh's brother gives us a photo calender every year that has their birthdays on it.
When I was younger and my mind sharper, I could always remember everyones birthdays... (except my brothers.. I knew what month, just could never remember the days...long story) any who.... I could never understand how my mom could never remember birthdates... now that I am older... I get it lol..