Calendar
by Kieran O'Shea · Booking & Events
Also makes 3 other plugins · 4.1K+ installs across the portfolio →
A simple but effective Calendar plugin for WordPress that allows you to manage your events and appointments and display them to the world.
Try it live opens a temporary test site in your browser, which can take about 20 seconds to load. Plugins that rely on outside services or a full server may not work completely there.
Health
B 80/100
no flags
Active installs
4K+
≈4.5K estimated
Momentum
+25%
downloads vs prior 30d
Biggest opportunity: Add “icalendar”, “calendar widget” and “add to calendar” to your wp.org tags. You rank #7, #21 and #22 for them without listing them, close enough for a declared tag to move you up. WordPress.org counts only your first five tags, so with 4 listed these are the slots worth spending.
80 health vs 69 average across 1,838 Booking & Events plugins
Install conversion
How it's measured →0.6%
of downloads still active
At least 4K of 681.7K lifetime downloads are still running, below its category: the median Booking & Events plugin keeps 0.8%, across 940 plugins.
Downloads count every update, not just first installs, so older and more frequently released plugins read lower. Compare against other Booking & Events plugins, not across the directory. wp.org reports active installs as the bottom of a band, so the real rate is this or higher.
This plugin shipped 2 releases in the last 12 months, and every existing install that updated counted as another download. wp.org publishes no split between first installs and updates, so we show the raw rate rather than guess at one.
Details
Directory ranking optimization
How it's scored →How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.
Well optimized
Most to gain: Support resolution
Updated 168 days ago
Tested up to WordPress 6.9.11, the current branch or newer
3.7★ over 24 reviews, smoothed to 3.97★ and held back under 25 reviews
4 of 5 tags set · short description in place
0 of 1 support threads resolved in the last 2 months
To rank higher: Mark more forum threads resolved — the resolved ratio feeds the ranking.
Get the full rank-higher report →Search visibility
How it's tracked →Directory searches this plugin turns up in, and which way each one is moving. WordPress.org publishes no history of search positions, so this starts the day we first tracked a keyword and never backfills.
33
Momentum
Losing ground
-0.3
Velocity
places per keyword, 28d
5%
Breadth
of keywords climbing, 28d
-0.2
Acceleration
recent half vs earlier
wp.org is where the directory puts the plugin for that search. On merit is where it would sit if results were ranked on rating, support and updates, without the install boost. The last column is how far the wp.org position moved, from our first reading in the last 90 days to the latest.
| Keyword | wp.org | On merit | wp.org move, 90 days |
|---|---|---|---|
| icalendar | #7 | #10 | down 1 |
| calendar your tag | #24 | #23 | 0 |
| calendar plugin | #23 | #24 | 0 |
| calendar widget | #21 | #23 | 0 |
| appointment calendar | #22 | #22 | down 2 |
| add to calendar | #22 | #22 | down 1 |
| simple calendar | #24 | #21 | — |
| website calendar | #21 | #24 | down 2 |
| wordpress calendar | #23 | #23 | — |
| wp calendar | #24 | #23 | down 4 |
| dates your tag | Not in the top 24 | ||
| events your tag | Not in the top 24 | ||
| times your tag | Not in the top 24 | ||
25 searches this plugin appeared in over the last 90 days, 10 listed. 15 left out as unrelated or noise (years, numbers, stray words). 3 of its tags aren't in the top 24 for their own search.
What to do about it
- Add “icalendar”, “calendar widget” and “add to calendar” to your wp.org tags. You rank #7, #21 and #22 for them without listing them, close enough for a declared tag to move you up. WordPress.org counts only your first five tags, so with 4 listed these are the slots worth spending.
Daily downloads
Since 5 Oct 2022 · 1,488 days · wp.org + Plugin Pulse archive
30-day downloads
Rolling 30-day volume · peak 3K · peaks are release surges
Directory rank vs rivals
wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you
Rating trend
Star average over time · dips mark rough releases
Health trend
Composite health score, snapshotted daily
Update activity
How busy the existing users are, measured as downloads in the last 30 days for every 1,000 active sites. A spike means a new release everyone's pulling; a long, slow decline means an aging user base that updates less.
Release cadence
Occasionally updatedHow often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.
2
releases in the last 12 months
6mo ago
latest release · v1.3.18 · 16 May 2026
27
tagged releases on record
Recent releases
What its installed base runs
via wordpress.orgShare of active installs on each version of this plugin · 97% run the current release. Green is the current release; a big slice on older versions is a user base that has stopped updating.
Estimated active installs
The public count shows “4K+”. Our estimate pins where the real number sits.
Crossed into this band 9 months ago; a band this size takes about a year or more to cross, which places it about 50% of the way through.
Install history since 2 Aug 2020
Latest updates
via wp.org changelogRecent releases and news for this plugin
- — Version 1.3.18 Fixed XSS issue with event link 1.3.18
- — Version 1.3.17 Fixed CVE-2025-14548 Checked compatibility with WordPress 6.9 Corrected missing domain on some i18n calls Updated POT file for translations Achieved green check on latest Plugin Check version (1.7) Hook add_calendar_entr 1.3.17
- — Version 1.3.16 Fixed error on event save for some users; Attempt to assign property “event_title” on null Fixed DB error when attempting to display a calendar with a limited number of categories Ensured the version of calendar is corre 1.3.16
- — Version 1.3.15 Fixed CVE-2024-2831 Refactored DB calls to increase code re-use, improve auditability and harden security Comprehensive review and refactor of all variable reads, writes and sanitising Brought code and comments up to lat 1.3.15
- — Version 1.3.14 Correcting CSS that was inadvertently overriding wider site elements Removed use of date_i18n – this changed in WordPress 5.3 and now causes undesired operation on upcoming events Enhanced use of CSS colours; added backg 1.3.14
- — Version 1.3.13 Fixed loading order issue with internationalisation Enabled the full 30 characters in the title, even for unicode Fix ability to add basic HTML (line breaks etc.) into event descriptions Validated performance and compati 1.3.13
Security history
via Wordfence IntelligenceAll 6 disclosed vulnerabilities are patched in the current version (1.3.18). Sites still on an older version should update.
- Patched Medium · 6.4 Calendar <= 1.3.17 - Authenticated (Contributor+) Stored Cross-Site Scripting ↗2026-07-06 CVE-2026-14827 Improper Neutralization of Input During Web Page Generation Affects <= 1.3.17 Patched in 1.3.18
- Patched Medium · 6.4 Calendar <= 1.3.16 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'event_desc' ↗2025-12-22 CVE-2025-14548 Improper Neutralization of Input During Web Page Generation Affects <= 1.3.16 Patched in 1.3.17
- 2024-04-29 CVE-2024-2831 Improper Neutralization of Special Elements used in an SQL Command Affects <= 1.3.14 Patched in 1.3.15
- 2018-10-30 CVE-2018-18872 Improper Neutralization of Input During Web Page Generation Affects < 1.3.11 Patched in 1.3.11
- 2016-11-08 Improper Neutralization of Input During Web Page Generation Affects < 1.3.8 Patched in 1.3.8
Vulnerability records provided by Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. License and terms.
CVE records: Copyright 1999-2026 The MITRE Corporation. CVE terms of use.
Behavioral tests
via WP HiveAutomated install-time checks, tested on PHP 8.1.12 · WP 7.0.1
Languages
via translate.wordpress.orgTranslated into 134 languages, 5 at 90% or more
Plus 110 more locales with partial translations.
AI assistants
How it's measured →Whether ChatGPT and Claude name this plugin when asked the category question, and whether the readme gives them something to quote.
Not measured yet for this plugin’s topics. Its tracked searches are not among the measured topics. See the topics measured so far.
Readme readiness
5 of 8 pass · checked 29 Oct 2026Can an assistant quote this readme? Eight deterministic checks over the wp.org listing, no model involved.
- ✓ Says what it does "A simple but effective Calendar plugin for WordPress that allows you to manage your events and appointments..."
- ✓ Has a FAQ 25 questions in the FAQ.
- ✓ FAQ asks real questions 23 of 25 read like questions a user would type.
- ! Names who it is for Never says who the plugin is for or what they use it for.
- ! Names what it works with Names no plugin, service or platform it works with.
- ! Headings and lists 0 headings and 1 list; assistants quote headed sections and bullet lists, not paragraphs.
- ✓ Enough to quote 1,367 characters of description.
- ✓ Tags match the text All 4 tags appear in the text.
Growth timeline
Install-tier crossings we have observed, and how long each tier took to outgrow
- 2026-02-18 5K+ → 4K+ down after 326 days in tier
- 2025-03-29 6K+ → 5K+ down after 4 days in tier
- 2025-03-25 5K+ → 6K+ up after 1 days in tier
- 2025-03-24 6K+ → 5K+ down after 296 days in tier
- 2024-06-01 7K+ → 6K+ down after 245 days in tier
- 2023-09-30 8K+ → 7K+ down after 162 days in tier
- 2023-04-21 9K+ → 8K+ down after 164 days in tier
- 2022-11-08 10K+ → 9K+ down after 1178 days in tier
Competes with
The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).
- F FT Calendar 100+ installs · 3.5★ · 4 shared tags D
-
AM Events 80+ installs · 4.2★ · 3 shared tags D -
Event CLNDR 70+ installs · 4.3★ · 3 shared tags D -
The Events Calendar 600K+ installs · 4.2★ · 2 shared tags A -
Events Manager – Calendar, Bookings, Tickets, Appointments and more! 60K+ installs · 4.2★ · 2 shared tags B -
WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce 20K+ installs · 4.0★ · 2 shared tags B
Embed this report card
Drop a live Pulse card for Calendar into a readme, a review or a deck. It updates itself.
<iframe src="https://plugins.wpmayor.com/embed/calendar" width="480" height="300" style="border:0" loading="lazy" title="Calendar — Plugin Pulse"></iframe> Calendar: 4K+ active installs, 3.7★ (24 reviews). Plugin Pulse (WP Mayor), as of 2026-10-31. https://plugins.wpmayor.com/plugin/calendar
Spotted a number that looks wrong? Report a data issue and we'll check it against the source.