Get the first day of the week for the calendarʼs locale

# IntlCalendar::getFirstDayOfWeek

(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)

IntlCalendar::getFirstDayOfWeek — Get the first day of the week for the calendarʼs locale

### Description

Object-oriented style

public IntlCalendar::getFirstDayOfWeek(): int|false

Procedural style

intlcal_get_first_day_of_week(IntlCalendar `$calendar`): int|false

The week day deemed to start a week, either the default value for this locale or the value set with IntlCalendar::setFirstDayOfWeek().

### Parameters

`calendar`

  An IntlCalendar instance.

### Return Values

One of the constants `IntlCalendar::DOW_SUNDAY`, `IntlCalendar::DOW_MONDAY`, …, `IntlCalendar::DOW_SATURDAY` or `false` on failure.

### Examples

Example #1 IntlCalendar::getFirstDayOfWeek()

`<?php
ini_set('date.timezone', 'UTC');
$cal1 = IntlCalendar::createInstance(NULL, 'es_ES');
var_dump($cal1->getFirstDayOfWeek()); // Monday
$cal1->set(2013, 1 /* February */, 3); // a Sunday
var_dump($cal1->get(IntlCalendar::FIELD_WEEK_OF_YEAR)); // 5
$cal2 = IntlCalendar::createInstance(NULL, 'en_US');
var_dump($cal2->getFirstDayOfWeek()); // Sunday
$cal2->set(2013, 1 /* February */, 3); // a Sunday
var_dump($cal2->get(IntlCalendar::FIELD_WEEK_OF_YEAR)); // 6`

The above example will output:

    int(2)
    int(5)
    int(1)
    int(6)

### See Also

- IntlCalendar::setFirstDayOfWeek() - Set the day on which the week is deemed to start

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