It's an interesting topic. We think making international phone calls causes confusion with regard to time zones... wait until until there are humans on Mars!! Obviously phone calls to Mars would be impractical given the length of time light/radio signals take to reach there.
I think the reason this is so confusing is not because of the maths involved, but because we are simply so used to our date system. It's like counting numbers in hexidecimal. It's just as logical, but we're simply not used to it.
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