I got the "That's just crazy" achievement in 22/7/2016!!! I cant remember how I knew what this achievemt is, but I remember hunting for it and making sure to log in from my phone even while on vacation.
Now that's crazy. Makes me sad thinking this site is shutting down, being here for so long.
Edit: Just remembered. While hunting for secret achievements, I noticed that those who had this one usually got it 265 days after the "log in 100 days in a row" one.