I am playing minecraft for a pretty lng time and now I came to a conclusion that i relly need to change my minecraft name and I ran into a bug that says that I have to wait -3777 days till i can change may name again

Put the summary of the bug you're having here

What I expected to happen was...:

to change my name normaly
What actually happened was...:

I pressed change on my name and appeard what i said in the summary