Sentence examples for surprise for from inspiring English sources

The phrase "surprise for" is grammatically correct and can be used in written English.
It is typically used to indicate that something is intended to surprise someone. Example: "I have a surprise for you!" In this sentence, "for you" indicates that the surprise is intended for the person being spoken to. Another example: "She planned a surprise party for her friend's birthday." In this sentence, "for her friend's birthday" indicates when the surprise will take place.