Personally I think putting a year in those journal entries was always a mistake. At least a year that’s shown so prominently. Showing 2021 is out of character, showing 1899 would get confusing, and showing 1900 is also inappropriate for a game that’s meant to be in the Victorian Era. (Yes, you could write a story and say that in your world Queen Victoria lived for 10,000 years, so your futuristic spaceships are technically Victorian Era, but that’s cheating and you know it.)
From the very beginning the game should have said “London was stolen by bats about 30 years ago, in the early 1860s,” and then stuck to that line no matter how many decades passed in real time.