Function esbat::daily_lunar_phase

pub fn daily_lunar_phase<Tz: TimeZone>(t: Date<Tz>) -> Phase

Calculates the lunar phase for a given date.

This determines the principal phase (new moon, first quarter, full moon, or third quarter) that occurs on the date t or the intermediate phase between the previous and next principal phases.

use chrono::{Date, TimeZone, Utc};
use esbat::{Phase, daily_lunar_phase};

let t = Utc.ymd(2020, 10, 31);
assert_eq!(daily_lunar_phase(t), Phase::FullMoon);