AWRC1P change back to AM/PM

probably because you have it set to 12 pm midnight and not 12 noon so at 12 noon it is actually midnight when the date will change
reset the time of the day to am or pm and any pm settings will change the date at 12 midnight.

am/pm may not be a separate control. Try setting the hours 12 hours ahead to change from am to pm.

Reset the time, using 0-11 for the AM hours and 12-23 for the PM hours.

Reset the time using 0-11 for the AM hours and 12-23 for the PM hours. For example, for 6AM use 6 and for 6PM use 18.

Your CM921 has 6 built in temperature settings based on time of day:

1 - 6:30 AM
2 - 8:00 AM
3 - 12:00 PM
4 - 2:00 PM
5 - 4:00 PM
6 - 10:30 PM

meaning that at 6:30 AM the themostat will change its temperature setting to setting 1, at 8:00 AM it will change the temperature setting to setting 2, and so on. To schedule temperature settings which best fit you, determine which time periods you would like more or less heat.

For instance, to fit what you requested in your question you could program a temperature you would like to maintain in the morning and afternoon times when you would like it to be on, and in the time periods in between set a lower temperature as follows:

1 - 20C
2 - 16C
3 - 16C
4 - 20C
5 - 20C
6 - 16C

With this example your thermostat would turn on at 6:30 AM as long as the temperature was below 20C and maintain that temperature until 8:00 AM. At 8 it would change its setting to 16C allowing temperature to drop from 8 AM to 2 PM to a lower setting to conserve energy until afternoon time when the setting would change back to 20C from 2 PM to 10:30 and then change back to 16C to save energy throughout the night. The actual temperatures would be at your discretion based on your individual comfort level.

Pages 5 and 6 of the following link will guide you in setting each of the 6 temperature settings.

http://www.wolseleysbc.co.uk/_STEPData/Assets/Honeywell%20CM921%20Room%20Thermostat.pdf

I hope this helps. Let me know if you have any additional questions.

It is standard military time, 24 hour format. 1:00 pm is 1300 hours and continues to increase till midnight, then resets to 0100 and so on. Hope this helps

mcdevito75 here, Many Casio Watch Models out there, I'll bet however your Casio is displaying say 1 AM rather than 1 PM as it should if the time is indeed PM after 12 noon, if so, this is why the date is changeing at 12 PM rather than, 12 AM simply re-set your casio and make sure the time of day is set at PM for time after 12 noon and AM for time anywhere before 12 NOON. Also, as you set your Casio, look for anything that may give the hint of Military time, this may be revilled as 12 hours or 24 hours, if you have anything like this, make sure it's set for 24 hours. If you have additional problems, visit a small watch repair shop in your area. Again there are many, many Casio models out there and without your watch with me it's difficult to be more accurate.

1st: make sure the watch is set to "tme" , the botton dail display, press bottom right stem
2nd: pull out the bottom right stem ,
3rd: press the left top stem for increase time . i.e. 2:40 pm to... 2: 45pm
4th, or press the left bottom stem for decrease time: i.e. 2:40pm to .. 2:30 pm
5th: once time is good, then press in the right bottom stem,

i have the exact same problem, i the picture of the product, it says pm on the side of the display, and its can say pm ont he display !!

this is a glitch in his product.