There isn’t one single, universally prescribed “Buddhist” way to say “Have a Wonderful Day” in the same way some religions might have specific blessings. Buddhism is more about cultivating positive states of mind and wishing well for others, which can be expressed in many ways.
However, the spirit of wishing someone a wonderful day aligns perfectly with core Buddhist principles like Metta (loving-kindness).
You could express this sentiment in ways like:
- “May you be well and happy today.” (This is very close to the phrases used in Metta meditation.)
- “May your day be peaceful.”
- “May you have a day filled with peace and clarity.”
- “Wishing you joy and ease today.”
- “May all beings be happy.” (A broader wish that includes the person you’re speaking to).
In many Buddhist cultures, common secular greetings are used, but the underlying intention of goodwill is what matters. For example, in Thai, “Sawasdee” is a general greeting that carries well wishes.
Essentially, any sincere expression of goodwill and a wish for the other person’s happiness and well-being would be in line with Buddhist values. The focus is on the genuine intention behind the words.