Table of Contents
About WebCalendar
WebCalendar is a PHP-based calendar application that can be configured as a single-user calendar, a multi-user calendar for groups of users, or as an event calendar viewable by visitors. MySQL/MariaDB, SQLite3, PostgreSQL, Oracle, DB2, Interbase, MS SQL Server, or ODBC is required. The version 1.9.X releases are still a little rough around the edges since these include an overhaul of the UI to use Bootstrap and jQuery and a complete rewrite of the web-based installer.
WebCalendar can be setup in a variety of ways, such as…
- A schedule management system for a single person
- A schedule management system for a group of people, allowing one or more assistants to manage the calendar of another user
- An events schedule that anyone can view, allowing visitors to submit new events
- A calendar server that can be viewed with iCalendar-compliant calendar applications like Mozilla Sunbird, Apple iCal or GNOME Evolution or RSS-enabled applications like Firefox, Thunderbird, RSSOwl, FeedDemon, or BlogExpress.
Overview of Features
- Multi-user support
- 30 supported languages: Basque, Bulgarian, Chinese-Big5, Chinese-GB2312, Czech, Danish, Dutch, English-US, Estonian, Finnish, French, Galician, German, Greek, Holo-Big5, Hungarian, Icelandic, Italian, Japanese, Korean, Norwegian, Polish, Portuguese_BR, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish, Welsh (see current list of translations here)
- Web-based installer
- Auto-detect user’s language preference from browser settings
- View calendars by day, week, month or year
- View another user’s calendar
- View one or more users’ calendar via layers on top of your own calendar
- Add/Edit/Delete users
- Add/Edit/Delete events
- Repeating events including support for overriding or deleting (exceptions)
- Configurable custom event fields
- User-configurable preferences for colors, 12/24 time format, Sun/Mon week start
- Checks for scheduling conflicts
- Email reminders for upcoming events
- Email notifications for new/updated/deleted events
- Export events to iCalendar
- Import from iCalendar/ics format
- Optional general access (no login required) to allow calendar to be viewed by people without a login (useful for event calendars)
- Users can make their calendar available publicly to anyone with an iCalendar-compliant calendar program (such as Apple’s iCal, Mozilla Calendar or Sunbird)
- Publishing of free/busy schedules (part of the iCalendar standard)
- RSS support that puts a user’s calendar into RSS
- Subscribe to “remote” calendars (hosted elsewhere on the net) in either iCalendar or hCalendar formats (WebCalendar 1.1+)
- User authentication: Web-based, HTTP, LDAP or NIS
System Requirements
- PHP 8 or later
- PHP support and access to one of the following databases:
- SQLite
- MySQL/MariaDB
- Oracle
- Postgres
- IBM DB2
- Access to cron for Linux/Unix systems (to send out reminders)
Development Cost
The following metrics from Ohloh show how much it would have cost to commercially develop WebCalendar.
- Codebase Size: 138,588 lines
- Estimated Effort: 34 person-years
- Estimated Cost: $1,884,469
- (As of 11 August 2024)
Donations
If you’d like to help support the costs of developing, maintaining and supporting WebCalendar, please consider donating.
Developer Resources
- Github page for WebCalendar:
- Issues
- Pull requests
- Wiki
- Download the development code as a zip file
License
WebCalendar is available under the GNU General Public License, version 2.
For more information on this license:
Documentation
- System Administrator’s Guide
Introduction, installation instructions and FAQ - UPGRADING (WebCalendar 1.3.0)
Provides instruction on upgrading to version 1.3.7 from an older version - Database Design (WebCalendar 1.3.0)
Version 1.2.7 database schema
Most Recent Changes
Below are the most recent source code commits to github on the master branch.
- update composer.json / lock (#575)by bbannon on September 5, 2025 at 12:49 pm
update composer.json / lock (#575) * update composer.json / lock * Add PHP cs fixer
- Bump actions/checkout from 4 to 5 (#583)by dependabot on September 5, 2025 at 12:41 pm
Bump actions/checkout from 4 to 5 (#583) Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5. – [Release notes](https://github.com/actions/checkout/releases) – [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md) – [Commits](https://github.com/actions/checkout/compare/v4…v5) — updated-dependencies: – dependency-name: actions/checkout dependency-version: ‘5’ dependency-type: direct:production update-type: version-update:semver-major … Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
- Add new GitHub workflow to perform test installby craigk5n on September 4, 2025 at 7:26 pm
Add new GitHub workflow to perform test install * Add new GitHub workflow that will perform a test install with SQLite and then try to login * Switch to sqlite3 for test since sqlite is no longer available in PHP8 * Add debug output to headless.php
- Merge pull request #573 from craigk5n/dependabot/github_actions/actio…by craigk5n on September 4, 2025 at 2:11 pm
Merge pull request #573 from craigk5n/dependabot/github_actions/actions/checkout-5 Bump actions/checkout from 4 to 5
- Merge pull request #579 from bbannon/HTML5by craigk5n on September 4, 2025 at 2:09 pm
Merge pull request #579 from bbannon/HTML5 replace deprecated html attributes with style=””
Download Metrics
- Downloads via Github: 19267
- Downloads via SourceForge:
Related Links
- Standards
- Calendar client applications – You can use the applications to view events stored in WebCalendar if you enable its publishing settings.
- iCalendar/ics download sites – These sites contain calendars for holidays, sports teams schedules, music converts, etc. You can import these files into WebCalendar.
- iCalShare
- Apple iCal Library
- DateDex
- Project24: holiday and weather calendars