Scripts

Sorry for the simple question, but could you please tell me how to create a NEW_DAY_TRIGGER so that every 14th day of the month, on the surface level, at coordinate x1y1, a caravan named car_1 is created with creatures (for example, with 1 angel) and it travels to the city at coordinates x2y2? And if it's not too much trouble, please write an example of such a trigger... Because it seems like I'm writing everything correctly, but it still doesn't work; maybe there's an error somewhere.