Along those lines, thanks to Curtis Manwaring from this list for alerting me to the observed time zone anomaly for the Vidal California area...

Thanks. The question I have is how did the cell phone company (Verizon) know what time it was in Vidal, CA? There are what look to be 2 cell phone towers, one at Vidal Junction behind the only gas station (and California produce checkpoint) and another just over a mile south of the junction between rte 62 and 95. The time changes from Arizona (Mountain) to Pacific when traveling north of Vidal toward the junction. They must have a database somewhere and it would be nice to get a copy of that for the Olson database. Hopefully they've kept records going back several years. Sincerely, Curtis Manwaring