You can wish someone for Eid in a simple, respectful, and warm way like this:

  • “Eid Mubarak to you and your family. May Allah bless you with happiness, peace, and good health.”
  • For a more Islamic touch: “Eid Mubarak, Taqabbalallahu minna wa minkum (May Allah accept from us and from you).”
  • If you want something very short: “Eid Mubarak” or “Have a blessed Eid.”

These are all polite, widely used, and suitable for messages, calls, or cards.