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[Utility & Helpers](/categories/utility) 4. / 5. roukmoute/polyfill-calendar ActiveLibrary[Utility & Helpers](/categories/utility) roukmoute/polyfill-calendar =========================== PHP Polyfill for the Calendar extension v1.0.0(5mo ago)535.2k↓40.7%2MITPHPPHP >=8.0CI passing Since Feb 6Pushed 5mo ago2 watchersCompare [ Source](https://github.com/roukmoute/polyfill-calendar)[ Packagist](https://packagist.org/packages/roukmoute/polyfill-calendar)[ RSS](/packages/roukmoute-polyfill-calendar/feed)WikiDiscussions master Synced 3w ago READMEChangelog (10)Dependencies (8)Versions (14)Used By (0) Calendar Polyfill ================= [](#calendar-polyfill) [![Tests](https://github.com/roukmoute/polyfill-calendar/workflows/Tests/badge.svg)](https://github.com/roukmoute/polyfill-calendar/actions)[![License](https://camo.githubusercontent.com/289b30f11c3f8d645c48aa60bfd03660f4d3d650cfdd29d1a38180eb8299e543/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f6c6963656e73652f726f756b6d6f7574652f706f6c7966696c6c2d63616c656e646172)](LICENSE)[![PHP Version](https://camo.githubusercontent.com/8104d4556b1ee543acdd89e94c7a91dd61dccb8e63abb620d9d9f08f5efdd664/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f7068702d762f726f756b6d6f7574652f706f6c7966696c6c2d63616c656e646172)](composer.json) A PHP polyfill for the [calendar extension](https://www.php.net/manual/en/book.calendar.php). This library provides a pure PHP implementation of all calendar extension functions, allowing you to use calendar functionality without requiring the calendar extension to be installed. Requirements ------------ [](#requirements) - PHP 8.0 or higher Installation ------------ [](#installation) ``` composer require roukmoute/polyfill-calendar ``` Supported Calendars ------------------- [](#supported-calendars) ConstantCalendar`CAL_GREGORIAN`Gregorian Calendar`CAL_JULIAN`Julian Calendar`CAL_JEWISH`Jewish Calendar`CAL_FRENCH`French Republican CalendarAvailable Functions ------------------- [](#available-functions) ### Calendar Conversion [](#calendar-conversion) FunctionDescription[`cal_to_jd`](https://www.php.net/manual/en/function.cal-to-jd.php)Converts from a supported calendar to Julian Day Count[`cal_from_jd`](https://www.php.net/manual/en/function.cal-from-jd.php)Converts from Julian Day Count to a supported calendar[`cal_days_in_month`](https://www.php.net/manual/en/function.cal-days-in-month.php)Return the number of days in a month for a given year and calendar[`cal_info`](https://www.php.net/manual/en/function.cal-info.php)Returns information about a particular calendar### Gregorian Calendar [](#gregorian-calendar) FunctionDescription[`gregoriantojd`](https://www.php.net/manual/en/function.gregoriantojd.php)Converts a Gregorian date to Julian Day Count[`jdtogregorian`](https://www.php.net/manual/en/function.jdtogregorian.php)Converts Julian Day Count to Gregorian date### Julian Calendar [](#julian-calendar) FunctionDescription[`juliantojd`](https://www.php.net/manual/en/function.juliantojd.php)Converts a Julian Calendar date to Julian Day Count[`jdtojulian`](https://www.php.net/manual/en/function.jdtojulian.php)Converts a Julian Day Count to Julian Calendar Date### Jewish Calendar [](#jewish-calendar) FunctionDescription[`jewishtojd`](https://www.php.net/manual/en/function.jewishtojd.php)Converts a date in the Jewish Calendar to Julian Day Count[`jdtojewish`](https://www.php.net/manual/en/function.jdtojewish.php)Converts a Julian Day Count to the Jewish Calendar### French Republican Calendar [](#french-republican-calendar) FunctionDescription[`frenchtojd`](https://www.php.net/manual/en/function.frenchtojd.php)Converts a date from the French Republican Calendar to a Julian Day Count[`jdtofrench`](https://www.php.net/manual/en/function.jdtofrench.php)Converts a Julian Day Count to French Republican Calendar Date### Easter Functions [](#easter-functions) FunctionDescription[`easter_date`](https://www.php.net/manual/en/function.easter-date.php)Get Unix timestamp for midnight on Easter of a given year[`easter_days`](https://www.php.net/manual/en/function.easter-days.php)Get number of days after March 21 on which Easter falls for a given year### Unix Timestamp Conversion [](#unix-timestamp-conversion) FunctionDescription[`unixtojd`](https://www.php.net/manual/en/function.unixtojd.php)Convert Unix timestamp to Julian Day[`jdtounix`](https://www.php.net/manual/en/function.jdtounix.php)Convert Julian Day to Unix timestamp### Utility Functions [](#utility-functions) FunctionDescription[`jddayofweek`](https://www.php.net/manual/en/function.jddayofweek.php)Returns the day of the week for a Julian Day[`jdmonthname`](https://www.php.net/manual/en/function.jdmonthname.php)Returns a month nameUsage Examples -------------- [](#usage-examples) ### Converting between calendars [](#converting-between-calendars) ``` // Gregorian to Julian Day Count $jd = gregoriantojd(12, 25, 2024); // December 25, 2024 // Julian Day Count to Gregorian $date = jdtogregorian($jd); // "12/25/2024" // Convert to Jewish calendar $jewish = jdtojewish($jd); // "10/23/5785" ``` ### Getting Easter date [](#getting-easter-date) ``` // Get Easter Sunday timestamp for 2025 $easter = easter_date(2025); echo date('Y-m-d', $easter); // 2025-04-20 // Get days after March 21 $days = easter_days(2025); // 30 ``` ### Calendar information [](#calendar-information) ``` // Get info about all calendars $info = cal_info(); // Get info about a specific calendar $gregorian = cal_info(CAL_GREGORIAN); print_r($gregorian['months']); // Array of month names ``` ### Days in a month [](#days-in-a-month) ``` // February 2024 (leap year) $days = cal_days_in_month(CAL_GREGORIAN, 2, 2024); // 29 // February 2023 (not a leap year) $days = cal_days_in_month(CAL_GREGORIAN, 2, 2023); // 28 ``` Available Constants ------------------- [](#available-constants) ### Calendar Types [](#calendar-types) - `CAL_GREGORIAN`, `CAL_JULIAN`, `CAL_JEWISH`, `CAL_FRENCH`, `CAL_NUM_CALS` ### Day of Week Modes [](#day-of-week-modes) - `CAL_DOW_DAYNO`, `CAL_DOW_SHORT`, `CAL_DOW_LONG` ### Month Name Modes [](#month-name-modes) - `CAL_MONTH_GREGORIAN_SHORT`, `CAL_MONTH_GREGORIAN_LONG` - `CAL_MONTH_JULIAN_SHORT`, `CAL_MONTH_JULIAN_LONG` - `CAL_MONTH_JEWISH`, `CAL_MONTH_FRENCH` ### Easter Calculation Modes [](#easter-calculation-modes) - `CAL_EASTER_DEFAULT`, `CAL_EASTER_ROMAN` - `CAL_EASTER_ALWAYS_GREGORIAN`, `CAL_EASTER_ALWAYS_JULIAN` ### Jewish Calendar Formatting [](#jewish-calendar-formatting) - `CAL_JEWISH_ADD_ALAFIM_GERESH`, `CAL_JEWISH_ADD_ALAFIM`, `CAL_JEWISH_ADD_GERESHAYIM` License ------- [](#license) This library is released under the [MIT license](LICENSE). ### Health Score 51 — FairBetter than 95% of packages Maintenance72 Regular maintenance activity Popularity36 Limited adoption so far Community11 Small or concentrated contributor base Maturity69 Established project with proven stability Bus Factor1 Top contributor holds 70.4% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~241 days Recently: every ~314 days Total 10 Last Release 157d ago Major Versions v0.7.0 → v1.0.02026-01-17 PHP version history (4 changes)v0.1PHP ^7.1 v0.3PHP ^7.1 || ^8.0 v0.6.0PHP ^8.0 v1.0.0PHP >=8.0 ### Community Maintainers ![](https://www.gravatar.com/avatar/a864b67689c18f73803e34b6c4e269ab08395067ad635e1382ed96cc76f596a0?d=identicon)[roukmoute](/maintainers/roukmoute) --- Top Contributors [![roukmoute](https://avatars.githubusercontent.com/u/2140469?v=4)](https://github.com/roukmoute "roukmoute (50 commits)")[![kylekatarnls](https://avatars.githubusercontent.com/u/5966783?v=4)](https://github.com/kylekatarnls "kylekatarnls (21 commits)") --- Tags compatibilityportablepolyfillcalendar ### Code Quality Static AnalysisPHPStan, Psalm Code StylePHP CS Fixer Type Coverage Yes ### Embed Badge ![Health badge](/badges/roukmoute-polyfill-calendar/health.svg) ``` [![Health](https://phpackages.com/badges/roukmoute-polyfill-calendar/health.svg)](https://phpackages.com/packages/roukmoute-polyfill-calendar) ``` ### Alternatives [symfony/polyfill-mbstring Symfony polyfill for the Mbstring extension 7.8k1.2B687](/packages/symfony-polyfill-mbstring)[symfony/polyfill-ctype Symfony polyfill for ctype functions 4.0k1.0B178](/packages/symfony-polyfill-ctype)[symfony/polyfill-php72 Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions 4.7k684.0M35](/packages/symfony-polyfill-php72)[symfony/polyfill-intl-idn Symfony polyfill for intl's idn\_to\_ascii and idn\_to\_utf8 functions 3.4k806.5M131](/packages/symfony-polyfill-intl-idn)[symfony/polyfill-intl-normalizer Symfony polyfill for intl's Normalizer class and related functions 2.1k866.4M60](/packages/symfony-polyfill-intl-normalizer)[symfony/polyfill-php73 Symfony polyfill backporting some PHP 7.3+ features to lower PHP versions 2.4k595.3M79](/packages/symfony-polyfill-php73) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)