Why won't my Atomix digital clock change for daylight savings time?

My clock regularly sets itself, and I can mess up the time manually and it will automatically correct itself. But at this daylight savings time change, even with the DST switch turned on and the time zone switch correct, the clock is still an hour behind after almost 24 hours. What the heck. I've never had this problem with it before, I just get up in the morning and it has the right time already like my computers do.