For our 23PF1 series, you can set the time and day when you first use the firebox. With the firebox turned off, on the remote control, press and hold the settings button (first button on the top left, flower icon) for 3 seconds. Then use the plus button to set the hour. Next, you can use the minus button to set the minutes. Use the day button (lower coffee symbol) to select the day. When they're done, you have to wait until the indicator stops flashing. 

For more info, see our user manuals.