Press the button and the LEDs will animate before presenting the time. Hours 1-12 are displayed in the left column. Minutes 1-60 are displayed from the bottom right. The time can be read more quickly if you look at the numbers on the right, each row of LEDs is equal to five minutes.
Press the button again to see the date. This can be read in the same way as the time. The month is displayed in the left column. Days are displayed from the bottom right.