One thing I learned from our female IT-specialists is how offensive the term "man days" is.
Recently there was a discussion (all men) about efforts and "man days". I just said "It's Person Days - there are quite a couple of women in the team as well."
Short silence, bit surprised looks.
"Sure"
Continued in "Person Days"
Sometimes it doesn't take a lot to change language to the better. Just do it.