User:Bri/DateCountdown/doc

Usage
Will display a countdown showing the current date in a percentage bar relative to the interval date1–date2. Date1 should be earliest. Undefined results when current date is before date1 or after date2. Width parameter is optional width in pixels.

The percentage bar will be color coded as follows:
 * 0–19 percent: red
 * 20–49 percent: yellow
 * 50+ percent: green

Signpost deadline
In particular, this template is used to create Signpost/Deadline