This was early on, and I'm honestly not sure if this is still possible. But I had my farm on early fall of year 2, my buddies were over, I was showing them where I was at, and we ended up heading out and doing things. Somehow, I had forgotten to close out of the game or at least pause it when walking away. Since I was just showing them where I was at, I hadn't shipped anything or gained any skills. So I get home like 6 to 8 hours later, and lo and behold, it's late spring of year 3. I thought for a while I could just keep going, but I had been meticulous about watching Queen of Sauce, and when I found out it'd be a year and a half in game to get to where the recipes were available I had missed, it was too much. Scrapped the save file, stopped playing for a while, then eventually began anew.
Needless to say, not a mistake I ever made again.