IntlCalendar::inDaylightTime

Whether the objectʼs time is in Daylight Savings Time

Description

Object-oriented style

public bool IntlCalendar::inDaylightTime()

Procedural style

bool intlcal_in_daylight_time(IntlCalendar $calendar)

Whether, for the instant represented by this object and for this objectʼs timezone, daylight saving time is in place.

Parameters

calendar: An IntlCalendar instance.

Return Values

Returns true if the date is in Daylight Savings Time, false otherwise.

On failure false is also returned. To detect error conditions use intl_get_error_code, or set up Intl to throw exceptions.

Examples

Example #1 IntlCalendar::inDaylightTime

<?php
ini_set('date.timezone', 'Europe/Lisbon');
ini_set('intl.default_locale', 'pt_PT');

$cal = new IntlGregorianCalendar(2013, 6 /* July */, 1, 4, 56, 31);
var_dump($cal->inDaylightTime()); // true
$cal->set(IntlCalendar::FIELD_MONTH, 11 /* December */);
var_dump($cal->inDaylightTime()); // false

//DST end transition on 2013-10-27 at 0200 (wall time back 1 hour)
$cal = new IntlGregorianCalendar(2013, 9 /* October */, 27, 1, 30, 0);

var_dump($cal->inDaylightTime()); // false (default WALLTIME_LAST)

$cal->setRepeatedWallTimeOption(IntlCalendar::WALLTIME_FIRST);
$cal->set(IntlCalendar::FIELD_HOUR_OF_DAY, 1); // force time recalculation
var_dump($cal->inDaylightTime()); // true