Display date like "2 days, 1 hour".
This appears to be not a single value, but a value calculated from 2 other values. Is this accurate?
The values can be maintained as UNIX timestamps or MySQL date/time values. Do you know which they are?
This provides the last updated time of a page with intelligent calculation and some friendly formatting. If you are php literate the formatting is provided in a library that can be used by other code.
The addon also provides a symbol "FRIENDLY_DATE" for Magic Data (not free, but worth every penny :) ).