Casio F-91W cheat sheet
F-91W Tips and tricks
These are a few things I do to extend the use of the F-91W.
Seeing the full date quickly
From the main timekeeping screen, press in this order: C C C L L L. You can remember this easily as "down down down, up up up" buttons on the left side of the watch.
Doing this will show a blinking month and the day at top right.
When done reading the date, press C once to exit.
Technically, what you're doing here is going to the month setting, but it's a fast way just to see the full date when you need to.
Using the alarm as a timer
The F-91W does not have a countdown timer but does have an alarm. While you can't see the countdown using an alarm in this way, you can hear the beep, and sometimes that's all you need.
If you always start your "timer" at the top of an hour, quarter-hour or half-hour mark, this makes things easier.
Example 1: If at 2:30pm I want to set an alarm to sound 90 minutes later, that's 1 hour and 30 minutes. One hour after 2:30pm is 3:30pm, and 30 minutes after that is 4:00pm.
Example 2: If at 2:30pm I want to set an alarm to sound 45 minutes later, that's 1 half-hour and 1 quarter-hour. 2:30pm + 30 minutes is 3:00pm, and 15 minutes from 3:00pm is 3:15pm.
"Isn't the stopwatch technically a timer?"
No. The stopwatch counts up and not down. You can use the stopwatch as a "count-up" timer, but there is no way for the F-91W to beep when the stopwatch reaches a certain elapsed time. When you use the alarm as a timer of sorts, you get the beep.
A microfiber towel cleans the watch face easily even when dry
The watch face on the F-91W is either acrylic or a material similar to it. To clean the watch face without scratching, just use a microfiber towel. It actually works better than a paper towel.
Never use tissue paper to clean the watch face, as that is abrasive.
For the back of the watch and the strap, lightly dampen the towel so those areas get cleaned well. But for the face, you can use the towel dry and it will work nicely.
Other Casio watches that these instructions will work for
In addition to the other Casio watch models mentioned on the first page, the instructions here will also work for these models:
Published 2019 Nov 21
