I mean Iron Harvest already has a lot of stuff not present or possible with today's technology so I think it's just up to you if you want to bother changing the year or just expanding what's available.
It's what you assume to be, at least in the united states women had just been given the right to vote and people were able to be open about their sexuality etc. And I wasn't implying anything about an expedition, was just throwing around an idea since you asked for them.