Sorry mate, that's not gonna go into the calendar. I had thought about it when creating the calendar and decided to start from August and leave July out which might be one or two friendlies ... given the shape and format of the calendar August this year to May next year covers everything over 10 months (so two rows of five months each, five in 2021 and five in 2022). Adding the 11th month just for a one off friendly was going to mess up the formatting of the calendar. So for the July date (which will be only this Preston one), you will have to put it in your own diary and any friendlies and pre-season games that fall in August will be reflected in the calendar.