Many people hate Daylight Savings Time. Some feel it's a interference with "Real" Time, a blasphemous rejection of God's Time. Some refuse to acknowledge it, saying things like "The Presudebt will speak from from Washington August 11 at 8PM Eastern Standard Time", even though Washington is on Eastern Daylight Time in August, indeed, most of the year. People who take the above statement at its word will be an hour late roughly eight months out of twelve. How much easier it is to say "8PM Eastern [nothing] Time", and let people figure out the Standard/Daylight part themselves. That's what TV and radio stations do, or at least, they should not say "Standard Time" when it isn't.
Time on Earth is governed by the Sun. Most creatures are active during the day when they can see what they're doing, and rest by night. Rising, setting, and midday govern all living beings, from club mosses to humans. Even nocturnal animals like owls and bats are ruled by the Sun.
The time of day, of course, depends on where you are. When it's broad daylight in the Americas, it's night in Asia, and vice versa. The only "real" time, "God's time", is that told by a sundial. Build a sundial large enough and it will be precise enough to indicate not just the hour, but the minute or even a fraction thereof.
Sundials need to be customized for the latitude where they are installed; the gnomon (the usually triangular fixture in the center of the sundial, whose shadow indicates the hour) needs to point in the right direction to be accurate throughout the day and year. A gnomon in Cairo is a different shape from one in Oslo, and one in Sydney points the other way . If the angle is wrong, its shadow will fall in the wrong place.
When accurate mechanical clocks were invented, a problem arose. Precise clocks made it clear that the solar day (that is, the time between Noon on one day and Noon on the next), was not exactly the same during the entire year. The reason for this is that the Earth's orbit around the Sun is not a perfect circle; it's an ellipse, and the Earth's speed varies with the distance from the Sun in accordance with Kepler's second law.
Clockmakers adjust their machines to measure 24 hours in the average or "mean " day. Thus, True Local Solar Time (sundial time) gave way to Local Mean Time (clock time). The Royal Observatory at Greenwich, near London, kept Greenwich Mean Time, which became a de facto world standard. Some fancy clocks and watches with calendar "complications" (as horologists call them}, took advantage of them to also include an indicator for "Equation of Time", which is not an Einsteinian theory, but the difference between clock time and sundial time. According to Wikipedia,
The equation of time varies over the course of a year, in a way that is almost exactly reproduced from one year to the next [the small but accumulating error is corrected every leap year]. Apparent time, and the sundial, can be ahead (fast) by as much as 16 min 33 s (around 3 November), or behind (slow) by as much as 14 min 6 s (around 12 February). The equation of time has zeros near 15 April, 13 June, 1 September and 25 December.
Of course, the equation of time was only accurate for the Standard Meridian (see below) of your time zone; if you are East or West of that line, you have to make an additional correction. Pretty soon, people stopped caring, but for a while the "God's Time" people were willing to pay extra for it.
Longitude makes a difference. The farther East you are, the earlier the Sun rises, and the earlier it reaches the Noon meridian. Each degree of longitude equals 4 minutes of time. so when it's Noon in Portland, Maine, it's 11:57 in Boston, 11:45 in New York, 11:40 in Philadelphia, 11:36 in Harrisburg, 11:18 in Toledo, and 10:58 in Chicago. This was not a problem until modern "instantaneous" communications like the telegraph arose. Worse, it made railroad timetables a nightmare. Do you have time to change trains in Providence if one railroad's timetable is on Boston time and the other is on Philadelpia time?
This was such a problem for railroads (the Big Business of their day) that they decided to do something about it. In Britain, Greenwich Mean Time became standard for the entire railway system on December 11, 1847, and most public clocks followed suit soon after. A convocation of railroad executives in Chicago in 1883 resulted in the 4 time zones pretty much as we in the continental US know today, where the official time for the whole zone is calculated for one standard meridian. Local Mean Time gave way to Standard (Mean) Time.
Most US States adopted Standard Time soon after the railroads, but Congress didn't progress on the issue until March 19. 1918. The Standard Time Act also established Daylight Savings Time, but that part was repealed soon after and not reinstituted until World War II. The period when Daylight Savings Time is in effect was extended in 2007, and is in effect everywhere in the US except Hawaii (being near the Equator where day and night are always nearly equal, there's no need), and Arizona*, (where you can't tell people what to do.)
Predicatably, there was opposition to the Standard Time Act, especially the daylight savings part. People objected to humans daring to redefine "God's Time". Most didn't realize that Mean Time, which clocks measure, was already a human redefinition. Catching trains was apparently not important to them. The solution for such people, I suggest, would be to invest in a watch that shows the Equation of Time, so determining God's Time becomes a simple matter. Of course, you'd also have to account for the distance between you and your zone's standard meridian if you don't want to be late for the Rapture Express.
People today seem to be resigned to Standard Time. Although they like to complain about switching to and from Daylight Savings Time, they understand that if their favorite TV show airs at 8 PM Eastern Time, that means 8 Standard or Daylight, as the case may be.
*Except the Northeast corner, part of the Navajo Nation, which does observe Daylight Savings Time.