Laurie-Anne, there are two system variables that are linked with time, both in ms: cpInfoElapsedTimeMS and cpInfoEpochMS. The first gives you the time since the file started, the other since 1Jan 1970. I don't know what you want exactly to do with the time, it is possible to show it, but like with the Timer widget, you cannot yet trigger something when time is 'over'. In 6.1 there is a countdown widget, I'm not sure that it is working for HTML output.
Lilybiri