Wow. Yes. Good catch. It does seem like there was some dyslexia issues:
2012: 两千零一十二
2021: 两千零二十一
They were just 九 years off....and....their calendar was similar, too. Weird, huh?
https://curiosmos.com/experts-...-maya-civilizations/
Scholars note that other similarities include the ancient Mayan calendar and the portion of the traditional Chinese calendar.