So today is the day my lovely wife reaches that significant age-marker …. 

One starts to get young at the age of sixty …
Pablo Picasso

I was born old and get younger every day. At present I am sixty years young.
Herbert Beerbohm Tree

I will never be old. To me, old age is always 15 years older than I am.
Bernard M. Baruch

You are never too old to dream a new dream
C S Lewis