Revised Julian (Milanković) Calendar

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Revised Julian (Milanković) Calendar#

Note

Revised Julian calendar: https://en.wikipedia.org/wiki/Revised_Julian_calendar

Proleptic Revised Julian calendar is implemented by milankovic() helper and MilankovicCalendar factory. Years are assumed to be in the astronomical notation. (1 AD is 1, 1 BC is 0, 2 BC is -1) The date range is -5884328-11-22 to 5874902-11-21 for a 32-bit system and -25252754133241402-01-01 to 25252754133231977-10-12 on a 64-bit system.

Factories#

You can create an instance of date from either date components or a Y-m-d string format (years can be negative):

<?php

use Arokettu\Date\MilankovicCalendar;
use Arokettu\Date\Month;

$date = MilankovicCalendar::create(2900, 2, 29);
// or use a month object
$date = MilankovicCalendar::create(2900, Month::February, 29);
// or parse Y-m-d
$date = MilankovicCalendar::parse('2900-02-29');
// years may be negative and leading zeroes are ignored
$date = MilankovicCalendar::parse('-5000-2-000001'); // works too!

Getters#

There are getters for day, month, year, string representation and array representation:

<?php

use Arokettu\Date\JulianCalendar;

$date = MilankovicCalendar::parse('2900-02-29');

$date->milankovic()->getDay(); // 29
$date->milankovic()->getMonth(); // Month::February
$date->milankovic()->getMonthNumber(); // 2
$date->milankovic()->getYear(); // 2900
$date->milankovic()->getDateArray(); // [$y, $m, $d]: [2900, 2, 29]
$date->milankovic()->toString(); // Y-m-d: 2900-02-29
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