I'm in Central Time Zone of USA (CST = UTC-6, CDT = UTC-5). Last Sunday March 9, 2014 was the "spring forward" leg of DST at 2:00am. Some of my non-Casio RCs exhibited some bizarre behavior, advancing 1 hour well BEFORE 2:00am Sunday.
Casio manuals say their RC watches will automatically make up to SIX attempts to obtain the radio synch from Ft Collins, Colorado, beginning at midnight and every hour thereafter until 5:00am. The first successful "GET" cancels the all the remaining attempts for that day. Since my location is such that almost all first attempts at radio synch are successful, I can assume the Saturday night/Sunday morning midnight "GET" worked and subsequent early Sunday morning attempts were cancelled. But the cancelled Sunday morning 2:00am "GET" should be the one with the DST change. So, with the Casios, wouldn't they synch to the midnight "GET" and thereafter report CST for 24 hours (i.e. ALL Sunday) until the following day's "GET" finally updated the watches to CDT?
So, did my (and your) Casio units miss the DST changeover for almost a complete day due to their programming? I presume they did, but I did NOT verify for myself that they misreported the DST changeover for a day.
Thanks in advance for any illumination.