Meet Me at Nine (2010)

A man gets furious when he finds the text message "Meet me at 9" from his wife on the cell phone of a guest in his home. Out of jealousy, the man kills the guest, and then his own wife. However, her cell phone receives another "Meet me at 9" text message. The man asks for the address, goes to the cafe and shoots the messenger at the table. However, the man then finds out it is his birthday, and that all the people he killed were just planning his surprise birthday party.