My fiancée is 2 years and 2 1/2 months younger than me. 

My wife is 10 months older than me.

I'm 2 years and 3 months older than my wife.

Wife is 4 years younger, but our birthdays are close, mine March 23, hers March 20, first day of spring.

I'm 6 years older.  We just celebrated our 41st anniversary.  She hardly looks 41.   I guess I've taken good care of her ?.

Considering that I’ve always been attracted to much older than myself, most of my partners have been at least 20 years older than me. My most significant 20 year long term deceased partner was 36 years older than me.