Julian day is the continuous count of days since the beginning of the Julian Period. This crate implements a method to convert a JulianDay to and from the chrono's NaiveDate.
Example
use julianday::JulianDay;
use chrono::NaiveDate;
fn main() {
let naivedate = NaiveDate::from_ymd(2020, 2, 18);
let julianday = JulianDay::from(naivedate);
let date = julianday.to_date();
}