You did not specify UPM outdoor timer model.
1)
ET525C has 7 buttons, and is shaped like a computer mouse, and has a photocell
2)
DT420 & ET420 are dusk-to-dawn timers with clear plastic cover
3)
DT523 is dusk-to-dawn and shaped like apple phone
4)
PT555 is box-type with a door and timer has 6 screw terminals
I'm going to shoot-wild and offer programming for the one shaped like a mouse, the ET525c.
Here is manualDownload manual if you have high-speed, so you can see print larger.
Manual has 10 pages so I can't repeat everything. You will have to read along with your copy of manual.
1) Timer has MODE choices: I will help you program specific on-off times.
2)
Setting the clock: Press SET > press Up-Down to choose day of the week ... if today's newspaper says Friday, set timer to Friday
3) Press Set again to confirm day of week
4) Press arrows to set hour. If your watch says 10:30 am, click arrow until 10 am shows
5) Press Set to confirm hour
6) Press arrow to set minutes, until minutes match your watch.
7) Press Set again to confirm everything.
Clock is displayed now
Programming timer:
Timer gives you 20 programs
PROG1 PROG2 etc to 20
Each program needs a DAY it will operate
Each program has ON time, and OFF time
PROG1 ON
PROG1 OFF
Select PROG1 using UP key
Manual page 6 has diagram showing how display looks
Press UP until PROG1 ON shows
Notice: PROG shows in upper right corner, and 1 ON displays to the right of time
This means PROG1 ON
Note: sometimes the instructions say press UP, and sometimes they say press UP or Down ... when in doubt, write out the instructions, and it helps you understand.
Now press Set to begin
Press UP and different days will show. MO for Monday, Weekdays, weekends.
Press Set to confirm days you want PROG1 to turn ON
Press UP or DOWN to set hour you want PROG1 to turn ON
Press Set to confirm hour
Press UP or DOWN to set minutes you want PROG1 to turn ON
Press Set to confirm hour
Half way done with PROG1, you need to set PROG1 OFF times
Press UP until PROG1 OFF shows
Look at display, and look at figure page 6 manual
To right of time is number 1 with tiny word OFF, in upper right corner of display is PROG
Press Set to start
Press arrows until day shows (default will flash same days you picked for ON times) Tip: keep the same days!!! or timer will reset ON times for some reason.
Press Set to confirm days timer will turn PROG1 OFF
Press UP and DOWN to set hour for PROG1 OFF
Press Set to confirm hour
Press UP and DOWN to set minutes for PROG1 OFF
To advance to PROG2, PROG3, PROG4-20, press UP key
To end programing mode, press DOWN
If no keys are touched for 1 minute, timer returns to clock mode
Instructions carry on with more options, if problems persist, take aspirin and post again in the morning.