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       xkcd - A Webcomic - DateTime (2867)
        
       Image:
 (PNG) datetime.png
        
       It's not just time zones and leap seconds. SI seconds on Earth
       are slower because of relativity, so there are time standards for
       space stuff (TCB, TGC) that use faster SI seconds than UTC/Unix
       time. T2 - T1 = [God doesn't know and the Devil isn't telling.]
        
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