You are advised not to set the date between 8pm and 2am, otherwise the date would not change at midnight but 24 hours later.
Unscrew the winding crown and pull it out all the way. Turn it clockwise until the desired date displays.
Push the winding crown back in and screw it down all the way. Some TUDOR models offer a quick date set function in which case you should pull the winding crown one notch and turn it anti-clockwise until the desired date displays.