I turned 60 last September. The morning I woke up on the 1st January I thought "this is the year I turn 60".
I hated the idea a felt very old. As they year went on the date got nearer and nearer, and I was like a bear with a sore head. I did not want a party or to celebrate it.
In the end we had a party, the day went fine, and since then I have thought no more about it.
There are benefits with being over 60 (you can get all sorts of deals) so I think you are going have to put up with it until the day, then once the day goes he will be fine.



