The same old me

It's second day of Chinese new year!
I'm so excited!
There's school tomorrow!
wait.. whuuuuut...

Officially two days of Chinese new year. But since there's school tomorrow, it feels like 1.5 day of Chinese new year.

Found this interesting topic while surfing the web this afternoon.
Found it mind blowing too. Or is it something is wrong with my IQ.
1 minute = 60 seconds
60 seconds = 1 minute
1 minute + 1 minute = 2 minute
60 seconds + 60 seconds = 1 minute and twenty seconds
someone tell me why is there different answers!