When you open the app, you’ll immediately see details of the moon’s current status. It will tell you its position, distance from Earth and the constellation it is under. To change the date, press ‘Date’ on the bottom of the screen. You’ll then see 3 boxes in a column: Date, Month and Year. Use the D-Pad to highlight the ‘–’ or ‘+’ buttons on the left and right of each box, then press the mic button to increase or decrease the date, month or year. When you’re done press ‘Save’ on the bottom right and the homepage will display information about the moon on that date.