This is a simple module that implements a field format for the datetime field type.
It currently displays the date as an age in years or as a zodiac sign.
In the future this module will support multiple field formats for datetime where there is a need to calculate a value based on one or more date fields, such as:
- Select two date fields in a content type and display time between dates
- Determine age based on a Drupal variable (example - age as of July 31st 2014)
Eventually this may become a module that implements a new field type that is derived from one or more dates, similar to what Geofield does for locations.
There is a quick demo of the module on YouTube at: