That’s right, on a long sea voyage (we crossed most of the Pacific, through the Panama Canal, then docked east coast FL*) the captain would announce the time change every day, and you adjusted your watch hands. Important because the ship schedule ran on those times.
*We also crossed both the international date line and the equator.
I remember hearing an odd story many years ago about the Date Line. A family including a small child were flying west from Hawaii toward Japan. They left Hawaii around 11 PM and landed several hours later. But because they crossed the Date Line going west, it was something like 3 AM two days later. Unfortunately, the little kid's birthday was the day which got "erased" when they crossed the Date Line. The kid was distraught when he learned he lost his birthday. [Yes, unless they crossed the Date Line at exactly midnight, they would have had a short amount of time at the start or the end of his birthday.] Still, it's a pretty weird story.
When I was chatting on line with people all around the world, we had to adjust for time differences. I once chatted with someone from New Zealand (I live in New York). When we had to adjust our clocks, NZ would move in one direction while here in NY we move the other way, putting us 2 hours different from before when we both finished, after a few weeks being 1 hour different from before.
With someone in China, I told her about DST and she never heard of it because China didn't observe DST.
I vaguely remember in 1974 being on DST in the winter. But it didn't affect me in the morning while waiting for the school bus I was in the 5th grade). My school had a late starting time (9:30 AM) so the bus didn't pick me up until close to 9 AM, always daylight even on DST in the winter. Waking up around 8 AM still had us in daylight.
I'm glad Indiana got its times zones and DST observance straightened out by 2014 when my ladyfriend and I took Amtrak from NY to Indianapolis before renting a car to drive to her hometown of Louisville, Kentucky. By 2014, all of Indiana was observing DST, so the time in Indy was the same as in NY and Louisville. Otherwise, we would have had to wait an extra hour in the early morning for the car rental office in Indy to open, only to cross back into EDT on the drive south.