The year 1961 was rotationally symmetric.
This means that if you turned 1961 upside down (180 degrees), it would still say "1961".
The next time this will occur is in the year 6009.
It only works with the following numbers:
In the year 6009, you will be able to read the date upside down, which was the case in 1961.
The year 1961 inverted and read backwards is 1961.
This will happen again in the year 6009.
The year 1961 can be read upside down and that won't happen again until 6009
the year reads the same when turned upside down! it will happen again in 6009!
Albany Movement happened in 1961.
Raw Justice happened in 1961.
Bluebelle - ship - happened in 1961.
Friendship Nine happened in 1961.
Nicaraguan Revolution happened in 1961.
Siege of Jadotville happened in 1961-09.
It happened in 1961
Bizerte crisis happened on 1961-07-19.
Portuguese Colonial War happened in 1961.
Holtaheia Accident happened on 1961-08-09.