He says he'll 'happily' [='gladly'] postpone the appointment.
They have been 'happily' married for 12 years.
We 'happily' accept credit cards.
(..) Here you are. It's from the Doc! Dear Marty, if my calculations are correct... First let me assure you I'm alive and well. I've been living happily these past eight months in the year . The lightning bolt... STRANGER: Wait, kid! Wait a minute. What's this all about? He's alive! (..)1989 Back to the Future Part II