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Y2K Bug Simulator icon
Possibly abandoned Tested up to 4.9.33

Y2K Bug Simulator

The Y2K Bug Simulator adds filters to most core WordPress functions that report back a date, rendering 19xx in place of 20xx.

Active installs<10New
Downloads · 30d24▲ +84.6% vs prev. 30d
Rating—0 reviews
Health score21/100At risk
All-time downloads1.3KSince Apr 2014
Support resolved—No recent threads
RequiresWP 3.8.1PHP any
Downloads · 7d9▲ +12.5% week over week
Our verdict

Consider an alternative

Y2K Bug Simulator shows warning signs in 2026 — compare the alternatives below before installing. Was last updated 8 years ago, and scores 21/100 on our health check.

  • Small user base (<10 active installs)
  • Very few reviews so far
  • No update in 8 years
  • Only tested up to WordPress 4.9 (latest is 7.1)

How does it stack up?

Side-by-side on installs, updates, ratings & support

Daily downloads

123Jul 7Aug 20Oct 4
Yesterday0
Daily average (1y)1
Peak day10May 4, 2026
Last 12 months289

Download spikes usually follow a new release — each site that auto-updates counts as a download.

Rankings

Where Y2K Bug Simulator stands today

WordPress.org search rankings

Live position in the plugin search, top 100
KeywordPositionCompeting pluginsCategory
bugs >100 10,000 Best bugs plugins →
entertainment #89 108 Best entertainment plugins →
millenium #2 3 Best millenium plugins →
y2k #3 3 Best y2k plugins →

About Y2K Bug Simulator

From the official readme · v1.3

Description

The Y2K Bug Simulator partially mimics one of the potential y2k failures that could (and did) affect some systems after December 31, 1999. The specific failure it mimics is one which typically occurred in systems where years were represented using two digits rather than four. Thus, in an affected system, the day after December 31, 1999 might be rendered as January 1, 1900 (in this scenario, only the last two digits of the year roll over, the first two are hard-coded as “19”).

The bug that this plugin mimics was certainly not the only y2k bug, nor, arguably, a terribly significant one. It is, however, perhaps the most aesthetically interesting. The effect of this plugin on WordPress is to change 20xx dates into 19xx dates across page titles, posts, and comments, as well as archives and calendars.

Some things to note:

  • By default, on initial activation following install, only admin-level users will see the effects of the plugin. This can be opened to all users, including non-logged ones, through the new Y2K settings page (new in 1.2).
  • The date modification occurs immediately after the plugin is installed and activated. It disappears immediately after the plugin is deactivated/uninstalled.
  • The change is at the presentation layer only. This means, among other things, that all stored site content and data remain unchanged. Moreover, site navigation is not affected. If you click on a link to a post identified as being from February 14, 1914, it will bring you to the post for February 14, 2014 (but still say 1914).
  • Internal date references are not affected. If you create a post/add a comment while the plugin is active, that content will not be stored with the modified date, but with the actual date, and will show that date when the plugin is deactivated/uninstalled.
  • Any plugins/templates/other content that do not utilize WordPress core functions for date presentation will not have their dates modified.

Installation

  1. Upload jbl-y2k.php to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress

Changelog

1.3

  • Tested up to WP 4.9.8

1.2

  • Tested up to WP 4.1.
  • Added plugin settings page.
  • Added option to limit visibility of Y2K effect to admin users (default).
  • Fixed archive/calendar links for permalink formats other than ‘default’.

1.1

  • Tested up to WP 4.0. Added icon.

1.0

  • Initial release.

Full changelog on WordPress.org →

Screenshots

Screenshot demonstrating the effects of the plugin when activated. Note the changes to the page title, the post date, and the dates listed under "Recent Posts."
Screenshot demonstrating the effects of the plugin when activated. Note the changes to…

For developers

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Best Y2K Bug Simulator alternatives

All bugs plugins →
Alternatives
Rank Plugin Active installs Rating Updated Health
1 Hotfix Hotfix Provides unofficial fixes for selected WordPress bugs, so you don't have to wait for the… by Mark Jaquith 4K+ ★★★★★★★★★★ 4.7 (18) 4 months ago 61
2 WH Tweaks WH Tweaks Common functionality WordPress core should have but maybe shouldn't. by webheadcoder 90+ ★★★★★★★★★★ 5 (1) 9 months ago 47
3 Browsee Browsee A session replay speaks louder than a thousand events. by browsee 30+ ★★★★★★★★★★ No reviews 3 years ago 24
4 Project Tasks Project Tasks This Wordpress plugin is a complete flexible Projekt Task Management System. It's a very… by dreamsofmatter 10+ ★★★★★★★★★★ 5 (2) 12 years ago 30
5 Bug Animation Bug Animation Bug Animation adds animated flies and spiders that buzz across your WordPress site for a… by Abid KP <10 ★★★★★★★★★★ 5 (2) 1 month ago 67

FAQ

Y2K Bug Simulator: quick answers

Straight answers, pulled from live WordPress.org data.

Live data from WordPress.org · checked Oct 5, 2026

Is Y2K Bug Simulator free?

Yes. Y2K Bug Simulator is free to download and use from the official WordPress.org plugin directory.

Is Y2K Bug Simulator safe to use in 2026?

Y2K Bug Simulator shows warning signs in 2026 — compare the alternatives below before installing. Was last updated 8 years ago, and scores 21/100 on our health check.

How many websites use Y2K Bug Simulator?

Y2K Bug Simulator is active on <10 WordPress websites and has been downloaded 1,254 times since it launched in April 2014. It was downloaded 24 times in the last 30 days.

Does Y2K Bug Simulator work with WordPress 7.1?

Y2K Bug Simulator is officially tested up to WordPress 4.9.33, while the latest release is 7.1.2. It may still work, but try it on a staging site first.

When was Y2K Bug Simulator last updated?

The latest version, 1.3, was released on August 4, 2018 (8 years ago).

Who makes Y2K Bug Simulator?

Y2K Bug Simulator is developed and maintained by James Luberda.

What are the best alternatives to Y2K Bug Simulator?

The most popular alternatives to Y2K Bug Simulator are Hotfix (4K+ installs), WH Tweaks (90+ installs) and Browsee (30+ installs).

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