Supposed to be set in the late 1950's very early 1960's.

Hair styles were 1970's (especially the later episodes).

Mash supposed to be set in the early 1950's (Korean war) and their hair styles were 1970's.

Irks me to no end.

Yes, as the series went along, the once meticulous attention to detail began to be lost. The hairstyles, the clothes, and even the dialog became inauthentic to the era they were supposedly portraying.

Chachi’s mullet and Joanie’s perm look ridiculous for a show set in the early 60s. As did Richie’s mustache when he guest starred.

Apparently, the producers fought with Scott Baio over his hairstyle, and then just gave up.

I always thought that Scott Baio looked way, way too contemporary for a show that's supposedly set in the 1950s-early '60s. His long, feathered, blow-dried looking hairstyle always stuck out like a sore thumb. He would've looked more at home on something like Welcome Back Kotter than Happy Days.

Chachi's look was the worst by far. Happy Days had changed so much by the time this guy was headlining the show. Not good.

The hairstyles don't bother me. Joanie's perm looked good. As for M*A*S*H, even though Korea is the setting it is really more depicting the Vietnam War. Korean War didn't last 11 years, and Vietnam had all the draft backlash that led to it not being used anymore.

I suppose wearing haircuts that might have been considered 20 years out of date could hinder the actors' other opportunities during the hiatus.
I think in only the first two seasons do the actors have reasonable haircuts for the time.
Even so, Howard could have had his tapered a little closer in the back and around the ears.
Interestingly, I think a lot of haircuts worn today would work for a '50's setting.

I suppose wearing haircuts that might have been considered 20 years out of date could hinder the actors' other opportunities during the hiatus.
I think in only the first two seasons do the actors have reasonable haircuts for the time.
Even so, Howard could have had his tapered a little closer in the back and around the ears.
Interestingly, I think a lot of haircuts worn today would work for a '50's setting.

When the show started out even the EXTRAS had 1950's haircuts. Hence they knew that they were risking getting fewer jobs on shows set in contemporary times had HD tanked early on but they were willing to make that sacrifice.

So, why when the show had become a success couldn't the show's producers,etc. have told Mr. Baio and others that if they couldn't get haircuts/wear short hair wigs during filming, they'd find other performers who WERE willing to do that?

I suppose wearing haircuts that might have been considered 20 years out of date could hinder the actors' other opportunities during the hiatus.
I think in only the first two seasons do the actors have reasonable haircuts for the time.
Even so, Howard could have had his tapered a little closer in the back and around the ears.
Interestingly, I think a lot of haircuts worn today would work for a '50's setting.

It kind of reminds me of when Harrison Ford was making American Graffiti with Ron Howard. Apparently, George Lucas, the director, wanted Ford to cut his longish looking hair since the movie took place in 1962, and a man with longish looking hair wasn't suitable for the time-period. In the script (https://en.wikipedia.org/wiki/American_Graffiti#Casting), Ford's character had a crew-cut. Ultimately, a compromise was made in which Ford would wear a cowboy hat to hid his decidedly contemporary (for 1973) hairstyle.

Ron Howard said in his book that Anson Williams was trying for a singing career in the 70's so he didn't want a 50's or 60's haircut. That is a example of why things changed with hair.