There is a sort-of way to do this, but the results are not returned in chronological order and are based on any post within a thread, so if someone resurrects an old thread that could show up in search results regardless of how old the initial thread is.
If I’m searching for Tarptent and I want to limit my search to threads after 2018, in the search bar I’d type (without the quote marks) “tarptent after:2018”
This should eliminate most threads before that (though, again, any old thread that has a post in it that’s within the range you’re searching for will still be included).