Just stop. Mind you, I'd be happy with a country-wide single-time-zone if and only if either I were at the western edge of it, or if we just pushed the clock ahead 2-2.5 hours ahead before standardizing it.
All of the "just change your schedule instead of the time" arguments come from a naive understanding of what it's actually like to hold a regular job like most people have: your employer is pretty much the one and only determiner of your schedule for the majority of your week and your life. "Hey, I'm just going to come into work a few minutes later each day in the winter, and I'll start to float back the opposite way once spring kicks in" presumes the corporate world gives a damn about your scheduling needs. Most of the working world does not have the luxury of a job that, if they arrive 30 minutes late as a regular basis, they will not be fired from. Many people who work in workplaces with a time clock will get fired if they're a few minutes late from the employer-mandated start time more than a few minutes per month.
Also, many detractors of DST obviously don't have to schedule their work life with the starting times of their children's schools. "Well, if everyone floated,they could all float the same!" That's simply not happening. Workplaces like standardized time for a reason: because it places the burden of scheduling the workplace on the employer without having to have complicated time shifts every day (or every few weeks). If you have a job and children, and they shift time expectations in blocks independent of one another, the problem persists.
Many DST-detractors also seem to presume that, if you have children, getting them to school is simply a matter of getting them up in time to catch the bus, or to walk. Most areas of the country either do not have dependable public transportation where children can learn to commute themselves, nor live within walking distance of their school, and an increasing number of parents have to drive their children to school every year precisely because tight education budgets means something has to get cut, and school busing is one of the first to go - and it's easy to justify, because the logic is that if the parents don't approve a busing millage, they're the only ones who will be inconvenienced by it, anyway. Admittedly, this is a political failure where the citizen is somehow given collective veto power over the funding of schools, police, and fire services, but can't disapprove "millages" for any meaningful government spending such as corporate tax breaks and military weapon systems.
As far as California goes, some of its tech service sector effectively works from 5 to 5 precisely because they have to serve the needs of a country whose major business hubs are either in Eastern Time, Central Time, or Pacific Time. Mountain Time is said to exist, but I have deliberately chosen to forget it does.
Moving to one time zone wouldn't be impossible, of course. China does it and they are, roughly speaking, as wide as the mainland US.
Whatever the solution is, if it means that most Americans who leave work after 5PM get almost no useful daylight time for much of the year, it's a dead letter, and that won't change regardless of how many slashdotters who make their own hours tell them to "just" adjust their schedules.