@PotomacBob
What if an adult in 2025 were sent back to live life over arriving at age 14 in 1955? The significance of that date is that it the MC would be living his or her high school years beginning 4 or 5 years BEFORE the birth control pill. Eisenhower was president, rock n roll was just getting started, car culture was dominant, age of consent in many states was much lower than today, and the Civil Rights movement was in its earliest stages.
This is all essentially where the author needs to have more than a passing awareness of the era, and take the time to do some additional research first.
For example, actually take the time to go through the pop charts of the era to know what songs were actually popular. As well as movies and TV shows. And as this is 1955, one also can not forget the radio shows. In most of the country, radio was still far more popular than TV in that decade.
And it would also matter where the story is set. Yes, this is the start of the Civil Rights era. But such things would have much less of an impact in say San Diego or Buffalo than they would in Atlanta or Birmingham.
And there was still lots of sex before the pill came out. Condoms were readily available in almost any gas station bathroom vending machine, and there are other methods.
But the Space Race was already starting. Operation Paperclip had already spawned the Redstone Rocket by 1952, and it was already influencing a lot of popular culture.
So yes, a lot of research needs to be done. I have written more than a few stories set long before I was born, and in each of them I did a lot of research first. Everything from fashion trends and modes of transportation to pop culture, slang used, and much else.
In fact, pretty much for any I have written before WWII I had to put in a glossary at the end, or else much of the phrases used would not have made much sense to a modern reader. Otherwise some might understand what a "sangar" or "scumbag" was from the way it was used, but not really get it. And yes, both of those were slang terms a century ago for a condom. One now out of use, the other obsolete and means something else today.
I actually have one I am writing set in that era, and it is an interesting time. TV was just coming into it's own, and there were actually four TV networks at the time. ABC, NBC, CBS, and DuMont (which largely morphed into Metromedia, and ultimately Fox). TV was largely restricted to the bigger cities, so most people in the US still got their entertainment from Radio. Gunsmoke, Dragnet, Amos & Andy, and 1955 would be the end of the long running Jack Benny show.
So yes, a lot of research would be needed, or else it will simply come across as "1950s in name only".