I think the author has it backwards. Expiration dates in offer letters are normal, and should always be included. "Bullshit" is the exception: expiration date

I think the author has it backwards. Expiration dates in offer letters are normal, and should always be included. "Bullshit" is the exception: expiration dates that give you only 1-2 days. In the normal course of things, you want the expiration date to be there because the offer letter (depending on your jurisdiction) can be binding, and you don't want the candidate holding on to it forever and messing with your ability to hire someone in a timely manner. I usually add a 10 business day expiration, which allows the candidate enough time to consult lawyers/SOs while still maintaining the company's interests.