this post was submitted on 20 Nov 2024
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What would be easier with our conversation? I guess we are at the other side of the globe. I wasn't answering because I was sleeping, you won't answer immediately because you are sleeping, what would help if our clocked showed the same? Both of us sleep because the sun is down, not because the clock says something.
With long range space travel we will have to deal with the relativity of time as well. Lets say we define an Epoch and both of us do something exactly a googol second later but we live on a different planet, it wouldn't be at the same time because of relativity. If I would say lets do something when it is 12:00 in London, UK, Earth, than you can convert it to your relativity and time zone.
About the intetplanetary usage of the current system, it's already in effect, LTC aka Coordinated Lunar Time is already under development since this April.
https://www.smithsonianmag.com/smart-news/the-moon-will-get-its-own-time-zone-called-coordinated-lunar-time-under-nasas-lead-180984076/
So the solution is to just convert between time zones, and resync them sometime because they can drift because of relativity.
I don't know how a base 10 day would work, it just annoys me that its reform wasn't successful with the metric system. But I don't know how it will work when people will live on Mars. A day on Mars aka a Sol is 24 hours and 39 mins. Will they have "Mars hour" which equals 1 Earth hour and 1.6 Earth minutes? If not, they could simply use Earth hours, than it won't be possible to create classic circular clocks.
The conversation is easier because we have a shared understanding of the time.
When you ask me can you call me at 13:00, I currently need to google what your timezone is and convert it to my timezone to know whether my sun is up.
If instead I just know when my sun comes up and goes down in UTC, I can immediately answer if I'm available at 13:00
Relativity does make space more difficult, but we'll ultimately have to make some shared reference point there, too, as you've pointed out
But I have to google when the sun comes up for you, it's literally the same thing.
In the context of I'm not available and you need to know when to call, sure
In the context of we're currently talking and trying to plan when we'll talk again, UTC is infinitely easier once you have 5 different people talking