Localizing Dates with IntlDateFormatter Class in PHP

This class allows you to display dates in a localized format using pattern strings and/or canned patterns. This class represents the ICU date formatting functionality (formatting of dates in milliseconds). See examples: Localizing dates in foreign languages.
https://php.net/manual/class.intldateformatter.php

Syntax: Creating a new instance of IntlDateFormatter object:

<?php
 $formatter = new IntlDateFormatter(
   ?string $locale,
   int $dateType = IntlDateFormatter::FULL,
   int $timeType = IntlDateFormatter::FULL,
   IntlTimeZone|DateTimeZone|string|null $timezone = null,
   IntlCalendar|int|null $calendar = null,
   ?string $pattern = null
 );

OR using IntlDateFormatter::create() static method syntax:

<?php
 $formatter = IntlDateFormatter::create(
   ?string $locale,
   int $dateType = IntlDateFormatter::FULL,
   int $timeType = IntlDateFormatter::FULL,
   IntlTimeZone|DateTimeZone|string|null $timezone = null,
   IntlCalendar|int|null $calendar = null,
   ?string $pattern = null
 );

Or using the procedural style with datefmt_create() function:

<?php
 $formatter = datefmt_create(
   ?string $locale,
   int $dateType = IntlDateFormatter::FULL,
   int $timeType = IntlDateFormatter::FULL,
   IntlTimeZone|DateTimeZone|string|null $timezone = null,
   IntlCalendar|int|null $calendar = null,
   ?string $pattern = null
 );

$locale: Locale in which the date would be formatted (locale name, e.g. en_US). If null, it will use the default locale (Locale::getDefault())
$dateType: Date type to use:
- IntlDateFormatter::NONE default value
  The default value and its mean do not include the date.
- IntlDateFormatter::FULL
  Tuesday, January 31, 2023 (Completely specified style)
- IntlDateFormatter::LONG
  January 31, 2023 (long style)
- IntlDateFormatter::MEDIUM
  Jan 31, 2023 (medium style)
- IntlDateFormatter::SHORT
  1/31/23 (abbreviated style)
$timeType: Time type (same as $dateType)
- IntlDateFormatter::NONE default value
  The default value and its mean do not include the time.
- IntlDateFormatter::FULL
  1:35:51 PM Pacific Standard Time (Completely specified style)
- IntlDateFormatter::LONG
  1:35:51 PM PST (long style)
- IntlDateFormatter::MEDIUM
  1:35:51 PM (medium style)
- IntlDateFormatter::SHORT
  1:35 PM (abbreviated style)
$timezone: Time zone ID, default is date_default_timezone_get().
$calendar: The following constants are used:
- IntlDateFormatter::TRADITIONAL
  A Non-Gregorian Calendar must be specified in the locale, for example $locale = 'hi@calendar=BUDDHIST'. See Islamic Calendar, and Hebrew Calendar examples.
- IntlDateFormatter::GREGORIAN (Gregorian Calendar. It is the default calendar)
$pattern (optional):
Formatting patterns, see https://unicode-org.github.io/icu/userguide/format_parse/datetime/

Localizing dates in foreign languages:

Example: Using Danish Locale (procedural style):

<?php
 $fmt = datefmt_create(
          'da_DK',
          IntlDateFormatter::FULL,
          IntlDateFormatter::FULL,
          'America/Los_Angeles',
          IntlDateFormatter::GREGORIAN
       );
 echo datefmt_format( $fmt , time());

The preceding code outputs:

onsdag den 1. februar 2023 kl. 12.56.57 Pacific-normaltid

Example: Displaying Dates in Urdu (OOP Style):

The following code will automatically translate the current date and time into the Urdu language:

<?php
 $fmt = new IntlDateFormatter(
          'ur_PK',
          IntlDateFormatter::FULL,
          IntlDateFormatter::FULL,
          'America/Los_Angeles',
          IntlDateFormatter::GREGORIAN
       );
 echo $fmt->format(time());
 //بدھ، 1 فروری، 2023 1:07:12 PM پیسفک اسٹینڈرڈ ٹائم

Example: Translate the Date and Time into Arabic

<?php
 $fmt = new IntlDateFormatter(
          'ar_SA',
          IntlDateFormatter::FULL,
          IntlDateFormatter::FULL,
          'America/Los_Angeles',
          IntlDateFormatter::GREGORIAN
       );
 echo $fmt->format( time() );
 //الأربعاء، ١ فبراير ٢٠٢٣ م في ١:١٠:٥٢ م توقيت المحيط الهادي الرسمي

The Islamic Calendar

The following code prints the current Islamic (Hijri) date in en_US (English) locale:

Example: Displaying Current Hijri Date using the IntlDateFormatter::TRADITIONAL.

<?php
 $fmt = new IntlDateFormatter(
          'en_US@calendar=ISLAMIC',
          IntlDateFormatter::FULL,
          IntlDateFormatter::FULL,
          'America/Los_Angeles',
          IntlDateFormatter::TRADITIONAL
       );
 echo $fmt->format(time());
 //Wednesday, Rajab 11, 1444 AH at 1:22:34 PM Pacific Standard Time

The following code prints the current Islamic (Hijri) date in ar_SA (Arabic) locale:

<?php
 $fmt = new IntlDateFormatter(
          'ar_SA@calendar=ISLAMIC',
          IntlDateFormatter::FULL,
          IntlDateFormatter::FULL,
          'America/Los_Angeles',
          IntlDateFormatter::TRADITIONAL
       );
 echo $fmt->format(time());
 //الأربعاء، ١١ رجب ١٤٤٤ هـ في ١:٢٤:٠٢ م توقيت المحيط الهادي الرسمي

The Jewish Calendar

The following code prints the current Hebrew date in en_US (English) locale:

<?php
 $fmt = new IntlDateFormatter(
          'en_US@calendar=Hebrew',
          IntlDateFormatter::FULL,
          IntlDateFormatter::FULL,
          'America/Los_Angeles',
          IntlDateFormatter::TRADITIONAL
       );
 echo $fmt->format(time());
 //Wednesday, 10 Shevat 5783 at 1:42:32 PM Pacific Standard Time

The following code prints the current Jewish date in he_IL (Hebrew) locale:

<?php
 $fmt = new IntlDateFormatter(
          'he_IL@calendar=Hebrew',
          IntlDateFormatter::FULL,
          IntlDateFormatter::FULL,
          'America/Los_Angeles',
          IntlDateFormatter::TRADITIONAL
       );
 echo $fmt->format(time());
 //יום רביעי, י׳ בשבט תשפ״ג בשעה 13:46:36 שעון מערב ארה״ב (חורף)

The Date and Time Tutorials:

Generating a Timestamp in PHP