tempoch 0.4.2

Astronomical time primitives: typed time scales, Julian dates, UTC conversion, and interval operations.
Documentation 
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use qtty::{Day, Second};
use tempoch::{JulianDate, Time, TimeContext, Unix, UnixTime, JD, TT, UT1, UTC};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let ctx = TimeContext::with_builtin_eop();
    let probe_tt = JulianDate::<TT>::try_new(Day::new(2_460_000.25)).map(|e| e.to_time())?;
    let probe_ut1: Time<UT1> = probe_tt.to_with::<UT1>(&ctx)?;

    let unix =
        UnixTime::try_new(Second::new(1_700_000_000.0)).and_then(|e| e.to_time_with(&ctx))?;
    let back = unix.try_to::<Unix>()?;

    println!("probe TT JD  : {:.9}", probe_tt.to::<JD>());
    println!("probe UT1 JD : {:.9}", probe_ut1.to::<JD>());
    println!("Unix roundtrip: {:.3}", back);
    let _ = Time::<UTC>::from_chrono(chrono::Utc::now());
    Ok(())
}