The reason it says 55 years ago on whiteboards is because the time couldn't be processed, as it defaults to the start of it all, 1969, i think it was the unix epoch, where every electronic device got synchronized, that's why you cannot choose any year before 1969 in websites, it happened in 31 December of 1969, but some say it was on january 1, 1969, meaning, tommorow those 55 years become 56 years