Birthday Calendar

Yes, the person does have their birthday listed in Contacts and the date format is the same as another person whose age is shown.

I did a search in Calendar for the person with his missing age and his age is shown for the last two years and next year, just not for this year. See the top right of the screen shot below.

I have at least one other grandson where this is happening.

Most of the family members have their age showing on the calendar for this year. There are just a few who don't show their age this year. I'm beginning to think it is a bug in the software.