The Year 1961, it reads the same upside down, you're going to have to wait until 6009 before that happens again.
Riddle of the day! What happened in the middle of the twentieth century that will not happen again for 4,000 years?
Willie got the answer!
You're on a roll!
Immediately you won’t realize that this is not about cosmos and comets, which can fly past us once every 4,000 years, but only about numbers!
Or rather, about dates: Almost in the middle of the 20th century was 1961, if you turn the card with this date, it still turns out the same date.
I have already met this question on the site study daddy there are still many entertaining factors, as well as a lot of homework done for students and pupils of the school.
This is all because some numbers do not change when turned over (0, 1, 8), and the numbers 6 and 9, as it were, change places with each other.
From this set of numbers, the nearest date will be on the figure 6 in 4,000 years, i.e. Year 6009.