Hello,
To see if it would work, I tried to disconnect from the internet and set the date of my device to 2017. And surprise, it worked ; my guy came back after two years of exploration with more than 8K caps and lots of very interesting stuff. I did this until I had enough gear to have a stable vault.
However, after I set the date back to 2015 (so the time went backwards, that's the thing that broke the game I guess), I noticed that :
- some of my power generators had a rush failure risk of more than 6 million, and would win more than 5 billion XP by succeeding a rush (which is impossible due to the very high failure percentage) - it'll stay even after failing a rush, so I can't succeed any rush on these rooms
- when I send a dweller to explore, he never finds anything and the exploration log stays empty forever until I call him back
- the dweller I sent to explore before altering the date didn't lose any health nor gain any level (which is weird for a two years exploration, no ?) but he did equip the better gear he found
I don't complain because I know that I cheated (I find it quite funny actually), I'm just posting this message so as you know that it's possible to "chat" the time, and that it's quite a mess when you restore it. Maybe you should fix it somehow ? Or maybe not, it's the price for cheating after all