Shahzad Shahab

Season Spark loads tasteful front-end particle effects and lightweight visual overlays. The plugin’s implementation and admin UI provide the following behavior and options (exactly as implemented in the plugin):
<ul>
<li>Included effects: <code>christmas</code> (snow/twinkles), <code>halloween</code> (ghosts/pumpkins + fog overlay), <code>valentines</code> (hearts + confetti), <code>newyear</code> (occasional fireworks bursts), <code>easter</code> (eggs & bunnies, occasional large egg drop), <code>thanksgiving</code> (falling leaves + occasional turkey popup), <code>independence</code> (fireworks + occasional flag/spark bursts), <code>diwali</code> (lights/diya sparkles + occasional diya popup), <code>hanukkah</code> (menorah sparkles + occasional menorah popup), and <code>generic</code> (custom graphics: rain/stars/bubbles or an uploaded background).</li>
<li>Per-effect configuration: <code>enabled</code>, optional <code>schedule</code> with <code>start</code>/<code>end</code> dates, <code>density</code>, <code>speed</code>, and <code>color</code> for effects that use color (the admin shows color pickers only for effects that accept color).</li>
<li>Custom Graphics support: the <code>generic</code> effect can use an uploaded background (<code>custom_bg</code>) and an uploaded custom cursor image (<code>custom_cursor_image</code>). When <code>custom_bg</code> is set the plugin creates a lightweight animated background element instead of particles.</li>
<li>Custom Cursor support: when a per-effect <code>custom_cursor</code> is enabled the front-end will attempt to use a provided <code>custom_cursor_image</code> or bundled SVG image as an overlay cursor (implemented by the public JS initializer).</li>
<li>Accessibility: the plugin respects the user’s <code>prefers-reduced-motion</code> setting, supports a site-level <code>motion_reduced</code> admin toggle, and prints a small per-user motion toggle (stored in <code>localStorage</code>). When reduced motion is active, visual initialization is skipped.</li>
<li>Performance: only enabled effects have their per-effect JS files enqueued; the plugin localizes <code>seasonSparkSettings</code> and <code>seasonSparkImages</code> for front-end initialization and ships the <code>tsparticles</code> bundle under <code>assets/vendor/tsparticles/</code>.</li>
</ul>
Admin and developer features (as implemented):
<ul>
<li>Admin pages: top-level “Season Spark” menu with the subpages <code>Effects</code>, <code>Settings</code>, and <code>For Devs</code>.</li>
<li>Settings: global toggles (load particle library, reduce motion) and default density/speed values; the Effects page exposes per-effect controls, schedule toggles, density/speed inputs, color pickers for color effects, and WP Media-based selectors for custom background/cursor on the <code>generic</code> effect.</li>
<li>Developer filters present in the code: <code>seasonspark_get_registered_effects</code> (modify the list of effects), <code>seasonspark_settings_for_js</code> (filter settings passed to front-end JS), and <code>seasonspark_images_for_js</code> (filter the image mapping sent to JS).</li>
</ul>
Notes:
<ul>
<li>Default activation: by default only the <code>valentines</code> effect is enabled on activation.</li>
<li>Assets: effect scripts, images and styles are bundled under <code>assets/</code>; the plugin enqueues only enabled effect scripts to keep the front-end lightweight.</li>
</ul>

Season Spark

Lightweight seasonal and holiday visual effects for WordPress, including snow, fireworks, hearts, and more, with accessibility-friendly controls.

Edward Caissie

Simple plugin that adds classes to the <code>body_class</code> output upon activation, including: a full list of date related classes; a few holiday classes; and, a generic sample full calendar extension.
<h4>Copyright 2012-2015 Edward Caissie (email : edward.caissie@gmail.com)</h4>
This program is free software; you can redistribute it and/or modify 
 it under the terms of the GNU General Public License version 2, 
 as published by the Free Software Foundation.
You may NOT assume that you can use any other version of the GPL.
This program is distributed in the hope that it will be useful, 
 but WITHOUT ANY WARRANTY; without even the implied warranty of 
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
 GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
 along with this program; if not, write to the Free Software 
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
The license for this software can also likely be found here: 
 http://www.gnu.org/licenses/gpl-2.0.html

BNS Body Classes

Simple plugin that adds classes to the body_class output upon activation, including a range of date related classes.

Season Spark vs BNS Body Classes