I have to respectfully disagree. I have been in this industry for a long time and I configure a lot of devices, anywhere from $50 to $150K in cost, serves, routers, switches, etc. until the DNS-323, I've never once (at least in the last decade...maybe before...too long ago to remember ;-) had to specific/change the dates every year. In some cases I specify a time zone, in others, a time zone and starting/ending month/day/time and offset (great flexibility on the later). An example would be '2nd sunday in march at 2am, 1st sunday in november at 2am, +1 hour' Point being though, I set it once and don't touch it again until our beloved government starts mucking with the rules for no good reason.