At the time the script was written, the
Uniform Time Act hadn't been enacted. It's effective date was April 1, 1967. Prior to that, the US was on standard time (for the most part, there was a hodgepodge). Wikipedia says:
"From 1945 to 1966 there was no federal law on daylight saving time, so localities could choose when it began and ended or drop it entirely. As of 1954, only
California and
Nevada had statewide DST west of the Mississippi, and only a few cities between Nevada and
St. Louis. In the 1964 Official Railway Guide, 21 of the 48 contiguous states had no DST anywhere."
So giving the time in one or the other makes sense.
I never wrote that it didn't make sense for the script of "Tomorrow is Yesterday" to give the time as either EST or EDT, I wrote that in our alternate universe the only manned moon shot that launched on a Wednesday was Apollo 11, which launched when Daylight Saving Time was in effect almost everywhere in the USA, snad so the announcer shoudl have said Eastern Daylight Time if he was talking about Apollo II..
I quote "Tomorrow is Yesterday":
MAN [OC]: This is the five thirty news summary. Cape Kennedy. The first manned Moon shot is scheduled for Wednesday, six am Eastern Standard Time. All three astronauts who are to make this historic
If the announcer says the blast off is scheduled for 6 AM Eastern Standard Time, the announcer clearly believes that Cape Kennedy in Florida and/or the places where his listeners are, are in the Eastern Time Zone of the USA.
Places in the Eastern Time Zone include Haiti, Cuba, Quebec, Ontario, Florida, Georgia, South Caroline, North Carolina, Virginia, Maryland, Delaware, New Jersey, Pennsylvania, New York, Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire, Maine, Ohio, Indian, Michigan, and eastern parts of Kentucky and Tennessee.
https://www.chegg.com/homework-help...apter-1-problem-4e-solution-9780134195421-exc
Where did the
Enterprise appear in the skies?
WEBB: None, sir. It was just there, like it fell out of the sky or something.
CAPTAIN: (suddenly interested) Current position?
WEBB: Directly over the Omaha installation, sir. Holding there.
And the news report was heard on the
Enterprise bridge just a few minutes afterwards, so the starship probably didn't have time to move very far. before the bridge crew heard that news report. Captain Christopher's jet fighter caught up with it shortly afterwards, for example.
Omaha, Nebraska is in the central time zone. So would a radio signal from someplace in the eastern time zone be picked up near Omaha, Nebraska, hundreds of miles away? And if the transmitter had such range, would the announcer assume that everyone in range would be in the Eastern Time Zone?
So maybe the announcer meant that Cape Kennedy was would be using Eastern Standard Time the next Wednesday.
In 1969 states that used Daylight Savings Time were required to start on Sunday, April 27, 1969, and stop on Sunday, October 26, 1969. So if the first manned moon shot was Apollo 11 on July 16, 1969, its scheduled launch time would be given in Eastern Daylight Time if Florida was on daylight savings time in 1969, and in Eastern Standard Ttime if Florida was not on Daylight Saving time in 1969.
I think that Florida was on Daylight Saving Time in 1969. If so, the announcer would have said Eastern Daylight Time if he was giving the Florida time of the launch.
In that case:
The first manned moon shot in
Star Trek was scheduled to launch on a Wednesday sometime when Daylight savings time was not in effect in Florida, and thus between October of one year and April of the next year. Apollo 11 was the the only manned moon shot that launched on a Wednesday, on July 16, 1969, and that was during Daylight Saving Time. So
Star Trek would have to be in an alternate universe where the first manned Apollo mission was launched sometime when Florida was not using daylight saving time.
Or else:
The first manned moons h shot in was Apollo 11 on July 16, 1969, and Florida was not using Daylight Saving time when it launched. Therefore,
Star Trek would have to be in an alternate universe where Florida did not have Daylight Saving Time in 1969.
But what if Florida didn't use Daylight Saving times in 1969 in our history? Then it would be quite correct for the announncer to say that the first manned moon shot would be launched on a Wednesday, at a time given in Easter Standard Time. Thus
Star Trek would not have to happen in an alternate universe.
Except that the announcer said that the first manned moon shot would launch at:
Wednesday, six am Eastern Standard Time
And Apollo 11 launched on July 16, 1969, at 13:32 GMT or UTC.
https://en.wikipedia.org/wiki/Apollo_11#Launch_and_flight_to_lunar_orbit
GMT is Greenwich Meridian Time, which is the same time as UTC or Coordinated Universal Time. 13:32 UTC is the same as 1:32 PM UTC, and 13:32 UTC should be 08:32 AM EST (Eastern Standard Time, or 09:32 AM EDT (Eastern Daylight Time).
When did the announcer say the first moon shot would launch?
Wednesday, six am Eastern Standard Time
So the real launch time of Apollo 11 was 2 hours and 32 minutes after when the announcer said that the first manned moon shot would launch. Unless someone can find proof that the launch of Apollo 11 was scheduled for 6 am EST (or 7 AM EDT) but the countdown was delayed for about two and a half hours,
Star Trek must happen in an alternate universe which diverged from ours at least as early as Tuesday, July 15,1969 (the latest possible date for the news broadcast).