The American Sign Language (ASL) sign for “Have a good day” is made by placing your dominant hand in a fist with your thumb extended. Then, starting at your chin, move your hand up and away from your face in a smooth arc, ending with your thumb pointing towards the person you are signing to.
This sign is commonly used when saying goodbye to someone, and it can be used in both formal and informal settings. It is also a polite way to end a conversation, and it shows that you are wishing the other person well.