Railyard reset
The Rail Yard resets every Tuesday, so most likely just a slight hiccup.
Forum Discussion
Someone else posted on here about the same problem a couple of weeks ago, unfortunately for themselves it didn't reset on the following Tuesday and just carried on counting down for them so it's defiantly a glitch personally I would be contacting EA support about it and seeing if they can reset it for you and if that's not possible I'd also be asking about possible compensation as your missing out on a month and a halfs worth of track and the weekly 5 donuts too.
