Obviously depends what your DH likes but throwing everything out there -
Bowling, zoo, indoor rock climbing, laser tag place, ice skating, check on Ticketmaster to see if there are any fun shows concerts or sporting events that day, comedy club or improv (many have PG kid friendly events earlier evening), top golf, experience-based or themed dinner you haven’t done before, airsoft, escape room, wine or brewery tour (verify that kids are welcome), a “tourist” themed tour if available, ice skating, skiing/snowboarding, day trip somewhere