The current NexStar series do not have a real-time clock. When the scope is powered on and an alignment method is chosen, the last-entered time and location are automatically displayed.
Pressing UNDO at the prompt allows you to go through and change any or all of the location and time information.
Time is entered after the location and is also prompted. You can input either 24-hour military time or local time. If you enter a local time, such as 8:53, you’ll be asked to select AM or PM as the next step.
Pressing UNDO at any step lets you change the values if you’ve goofed.
You can connect a GPS unit to the scope through the auxiliary port to get the correct time as well as your location on the earth.