In general, you are rarely made conscious of just how arbitrary calendar time is. Technically, since the base year for the Indian calendar is 79AD, which is CE+78, I was born on 1, Kartik, 1896, and am already 45y old in lunar years, but still 44 by solar years.
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But solar calendars despite being harder to technologically track, are more useful, since harvest cycles etc. follow solar patterns, and not many practically important things track lunar time (night-time safety?)
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Lunisolar calendars try to triage the problem, by using lunar for daily needs, and a complex human-powered priesthood for the rare, expensive solar synchronization. If you think about it, it's like solving a small Y2K type problem every couple of years, by adding a month.
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There are no calendars that do not require such janky adjustments. Only the scale differs. Regular leap years (4 year, 1 day), modern leap years, every 4th year, except every 100th year not divisible by 400. Modern atomic clocks need to add leap seconds here and there.
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The solar cycle is better than a lunar cycle, but what's better than a solar cycle? A galactic cycle! Could you create a calendar with "leap" adjustments designed to somehow synch with galactic revolution? The galactic tick day is the beginning of that https://en.wikipedia.org/wiki/Galactic_Tick_Day …
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A calendar is more real based on the amount of temporal phenomenology it captures by default. If we picked most absolute T=0, which would be 13.2 billion years ago, and captured ALL the dynamics (including relativistic) between the Big Bang and us, how would the calendar look?
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Science fiction stories with alien species gloss over calendar tech too easily. A space-faring species would have to construct meaningful, galactic-scale, relativity-accommodating calendar systems. It would also need to reverse engineer the local society's calendar.
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Back on earth, lunar and solar dissonance also keep astrologers employed, since the moon is very significant, but its movement against the stars is determined by both its own movement and the solar year.
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End of conversation
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just have a guy stand there counting the seconds
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