One thing to be careful with about the date field is the auto
update option. If it is left enabled, it opens the door to the
possibility that you will actually change a topic perhaps on April
3, and the date correctly reflects the update. But maybe on May 5,
you accidentally open the topic, realize you didn't really wish to
change it, and open the correct topic. Using the field and auto
update, the topic would then incorrectly reflect May 5.