The text you want to visually date by color.
This template is intended to visually indicate an age associated with some text via its background color. Starting one year after the specified date, the background color gets redder ("hotter") each year until after 4 years it is fully red. This can be useful, for example, for repetitive tasks in to-do lists to see what items haven't had editor attention for a while if users update the date every time they complete the task.
The template currently has five colored tiers:
{{
Color by age|July 4, 2012|This is some example text.|note=This is an optional note for the tooltip.}}
which will render as
This is some example text.
because the specified date is old enough to trigger the red background color. It also uses the optional note that is appended to the tooltip.