McQuadls: I can't seem to get this achievement to unlock. I completely disconnected from the internet before launching the game, I made sure it said GOG was offline before launching the game, I turned off cloud saves for the game, I used an older save to make sure I never interacted with calendar man, I set the dates on my PC correctly, I made sure I was disconnected from my VPN when doing all this, and I made sure to check my save file was updating as each interaction with Calendar Man happened.

The save I used was from my Steam playthrough, I tested it on Steam and it unlocked just fine after doing the same things in GOG. I can see in GOG the achievement has a 1.3% completion rate, I just don't get what I'm doing differently from everyone else. I'm also trying to figure this out because I have more achievements unlocked on GOG and would have to replay a lot to get them on Steam. If anyone can help me out with this, that would be amazing. Thank you.