A more natural way to say it is “Wishing you a blessed Good Friday” or “Have a peaceful Good Friday.” Good Friday is often treated as a reflective, solemn day, so “Happy Good Friday” can sound a little off to some people.

Good options

  • Wishing you a blessed Good Friday.
  • Have a peaceful Good Friday.
  • Wishing you a meaningful Good Friday.
  • May this Good Friday bring you peace and reflection.

If you want to reply to someone

  • Thank you, and I wish you a blessed Good Friday too.
  • Thank you, wishing you peace on Good Friday as well.

If you want, I can also give you:

  • a more religious version,
  • a casual text-message version, or
  • a work-appropriate version.