imgserver
Web service wich returns header images for special days (Halloween,Christmas,etc). To use with Discourse add the follow code at CSS/HTML:Top
<p><img src="http://web_service_ip:8080"></img></p>
Note that the images need to be jpg format. Place them in the /img folder. Call them after the special day number and month number (e.g. 3110.jpg mean day 31 month 10 - Halloween).
Remember to adjust physical images at proper width and height. Do not use width and height in img tag.
How it works?
At every request the service find an image named after the current day. If not found return a standard 1px image otherwise return the proper special day image.
To compile the program use this tools. See here how to. Quick deploy on server with cloud tool.