The sopastrike.org script rocks, but you have to get up early on Wednesday and add it to all your sites, so what kind of strike is it if you have to work hard on that day? :)
Just add
<script type="text/javascript" src="//pastebin.com/raw.php?i=bip80DLx"></script>
somewhere between your <head>
and </head>
, and sleep late on Wednesday.
If you're using wordpress, do that at
wp-content/themes/
name-of-your-theme/header.php
Easy.
Check out the source at http://pastebin.com/bip80DLx
Note: the reason why this script is stored as an anonymous paste at pastebin is to ensure that we can't modify it in the future.
Putting it as part of this gist would have enabled us to insert malware later on (we wouldn't, but you don't really know us, now. Do you?)
There's also a preview version (would also work today) at http://pastebin.com/A94WmVKK, and you can try it by using the line
<script type="text/javascript" src="//pastebin.com/raw.php?i=bip80DLx"></script>
instead of the "production" line above.
Peace