When the 655 first came out, the DST settings didn't work. It appeared that subsequent firmware releases fixed this, but I just discovered a problem with 2.03NA. DST changes on November 6, which is the first Sunday of November. Ergo, the settings according to the docs should be "November, 1st, Sunday, 2:00AM." However, with this setting, the time changed on November 1 which was a Tuesday. I have changed my settings to "November, 2nd, Sunday, 2:00AM" and will see if that works this coming Sunday, but there is definitely a glitch.