Sharp FO-IS115N Operation Manual page 32

Setting the Date and Time
7
Enter a two-digit number for the hour ("00" to "23") and a two-digit
number for the minute ("00" to "59").
Example: 9:25
[05-JAN SAT 09:25]
8
START
Press
[ANTI JUNK #]
STOP
9
Press
28
to start the clock.
to exit.