100 or so years ago when I did landscaping work we worked 4 10 hour days/week so we had a fallback if we got rained out. If not rained out we had Friday off or could opt for OT work.
Another time in my life and being an "exempt" employee I didn't get paid for overtime - just had to do what had to be done and it was always more that 40/week - I did a flex schedule as did many people w/ 1 day off every 2 weeks. week 1 was 9,9,9,9,8 and week 2 was 9,9,9,9,off. Since I was always working more than 8 hours a day anyway I didn't even notice the "extra hour/day" and the nice thing about it was that no matter what was going on I was off every other Friday. Had to make it known what our "flex schedule" was going to be so everyone knew and I could change it any time as long as it didn't interfere with getting things done but I rarely changed. Everyone acted like adults and it worked out well for everyone.