Correct Time Zone

Using the Emerson CKD5809C manual (also with SmartSet(tm) ), try Zone 4. TIME ZONE button: "04".

Zone 1: Atlantic Time
Zone 2: Easter Time (Default)
Zone 3: Central Time
Zone 4: Mountain Time
Zone 5: Pacific Time
Zone 6: Yukon Time
Zone 7: Hawaiian Time

Reference:
http://www.emersonelectronics.ca/emerson/en/category/list/694
or
http://www.emersonelectronics.ca/emerson/en/product/details/2361

As for disabling the Daylight Saving Time (DST) time change I have some guesses to try (not having one of these radios in my hand) or just skip to #4 below.
1. Manually setting the time and see if this disables the DST change.
2. Is there a Zone setting other than above? Like maybe a Zone 0? And then manually set the time.
3. Look at http://www.fixya.com/support/t236208-daylight_savings_time_adjustment for my solution there and try adjusting the DST Start to the same as DST End or DST Start and End with a month of 0 (if that is possible).
4. Or for the really desperate, change the Zone to 5 during DST and back to 4 during standard time (no worst off than with no DST auto setting.) (After I wrote this, I found an Emerson reference to no DST areas, Saskatchewan in this case, in the CKS1850C manual http://www.emersonelectronics.ca/emerson/en/product/details/2383, pg 9, and this is their solution.)

It appears that the model CKS2288B is of an old design. I bought mine four + years ago. There is an addendum for the newer models that covers reseting DST to the new dates (2007 forward). However the CKS2288b does not respond to the instrictions in the addendum.