If we're going to assume that inertia is hard to fight, and that everyone is going to work 9-5 (not even a majority of people work these hours in the US): Set it up so that winter equinox has sunset at 7pm. This has the sun coming up at ~9am during winter at the 40th parallel. During the longest days of summer, daylight would be from about 6am to 10pm.

That timing is standard time + 1 all year round.

Looks like 2017-2018 57% percent of workers had flexible schedules: https://www.bls.gov/news.release/flex2.t04.htm