W3Schools.com

PHP Calendar Functions

PHP Calendar Introduction

The calendar functions are useful when working with different calendar formats. The standard it is based on is the Julian day count (Julian day count is a count of days starting from January 1, 4713 B.C.). Note that the Julian day count is not the same as the Julian calendar!

Note: To convert between calendar formats, you must first convert to Julian day count, then to the calendar format.

Installation

The windows version of PHP has built-in support for the calendar extension. So, the calendar functions will work automatically.

However, if you are running the Linux version of PHP, you will have to compile PHP with --enable-calendar to get the calendar functions to work.

PHP Calendar Functions

PHP: indicates the earliest version of PHP that supports the function.

Function Description PHP
cal_days_in_month() Returns the number of days in a month for a specified year and calendar 4
cal_from_jd() Converts a Julian day count into a date of a specified calendar 4
cal_info() Returns information about a given calendar 4
cal_to_jd() Converts a date to Julian day count 4
easter_date() Returns the Unix timestamp for midnight on Easter of a specified year 3
easter_days() Returns the number of days after March 21, on which Easter falls for a specified year 3
FrenchToJD() Converts a French Republican date to a Julian day count 3
GregorianToJD() Converts a Gregorian date to a Julian day count 3
JDDayOfWeek() Returns the day of a week 3
JDMonthName() Returns a month name 3
JDToFrench() Converts a Julian day count to a French Republican date 3
JDToGregorian() Converts a Julian day count to a Gregorian date 3
jdtojewish() Converts a Julian day count to a Jewish date 3
JDToJulian() Converts a Julian day count to a Julian date 3
jdtounix() Converts a Julian day count to a Unix timestamp 4
JewishToJD() Converts a Jewish date to a Julian day count 3
JulianToJD() Converts a Julian date to a Julian day count 3
unixtojd() Converts a Unix timestamp to a Julian day count 4

PHP Calendar Constants

PHP: indicates the earliest version of PHP that supports the constant.

Constant Description PHP
CAL_GREGORIAN Gregorian calendar 3
CAL_JULIAN Julian calendar 3
CAL_JEWISH Jewish calendar 3
CAL_FRENCH French Republican calendar 3
CAL_NUM_CALS   3
CAL_DOW_DAYNO   3
CAL_DOW_SHORT   3
CAL_DOW_LONG   3
CAL_MONTH_GREGORIAN_SHORT   3
CAL_MONTH_GREGORIAN_LONG   3
CAL_MONTH_JULIAN_SHORT   3
CAL_MONTH_JULIAN_LONG   3
CAL_MONTH_JEWISH   3
CAL_MONTH_FRENCH   3
CAL_EASTER_DEFAULT   4
CAL_EASTER_ROMAN   4
CAL_EASTER_ALWAYS_GREGORIAN   4
CAL_EASTER_ALWAYS_JULIAN   4
CAL_JEWISH_ADD_ALAFIM_GERESH   5
CAL_JEWISH_ADD_ALAFIM   5
CAL_JEWISH_ADD_GERESHAYIM   5

W3Schools Certification

W3Schools' Online Certification

The perfect solution for professionals who need to balance work, family, and career building.

More than 10 000 certificates already issued!

Get Your Certificate »

The HTML Certificate documents your knowledge of HTML.

The CSS Certificate documents your knowledge of advanced CSS.

The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.

The jQuery Certificate documents your knowledge of jQuery.

The XML Certificate documents your knowledge of XML, XML DOM and XSLT.

The ASP Certificate documents your knowledge of ASP, SQL, and ADO.

The PHP Certificate documents your knowledge of PHP and SQL (MySQL).

WEB HOSTING
Best Web Hosting
PHP MySQL Hosting
Best Hosting Coupons
UK Reseller Hosting
Cloud Hosting
Top Web Hosting
$7.95/mo SEO Hosting
Premium Website Design
WEB BUILDING
Download XML Editor
FREE Website BUILDER
Free Website Templates Free CSS Templates
Make Your Own Website
W3SCHOOLS EXAMS
Get Certified in:
HTML, CSS, JavaScript, XML, PHP, and ASP
W3SCHOOLS BOOKS
New Books:
HTML, CSS
JavaScript, and Ajax
STATISTICS
Browser Statistics
Browser OS
Browser Display
SHARE THIS PAGE