When is pay day

Hi, I just joined Asda recently. I need to figure out when pay day is so I can see how much overtime I need to do in order to pay for everyone’s Christmas presents. I also wanna know when the cut off is, I know at some places they pay you for all your shifts worked up until the week before pay day (I think this is called areers?) I’m not sure if the pay day date varies depending on store or city (this is my first job so I’m still understanding how everything works). Can some people please explain this to me if you have the time ? Thank you for the help in advance, it’s genuinely appreciated 🙏🏽