You do not have to add the schedule when adding a new menu. Leave the schedule menu type as "No schedule" and do not fill in the start and end date.
Click here for how to add a schedule: [https://scribehow.com/shared/Add_and_Delete_Menu_Schedules__HQLFSVHpT4qb6fHWzMWhVw](https://scribehow.com/shared/Add_and_Delete_Menu_Schedules__HQLFSVHpT4qb6fHWzMWhVw%5D%5D)