And nix that, I just solved it by randomly and blindly inputting the code for 10/12...but...it makes no sense in terms of logic!

I'm sorry you had this issue. Unless there's a bug, the solution to that puzzle is to insert the code shown on the tenth month, because the date is October 19th (my birthday btw :) ). I hope you enjoyed the rest of the game!!

It was truly terrific, it felt like a late-night 60's sci-fi horror adaptation of the Dig in a way. Big fan of your writing and directing style, cannot wait for your full length debut!

Damn, I never thought to consider the calendar in terms of months, having seen the 19/10 date on the calendar, my mind just got stuck on the fact that the lab changed passwords each day so I was thinking in terms of days.

I had to find this post to figure out the list was for months, and not days. I was sure the puzzle was to figure out a continuing pattern up til the 19th, but I couldn't see any repeating pattern in the codes.