Time After Time

   I am currently running about 12 players in my AD&D 1e campaign in roughly 3 three groups.. This means that I must keep STRICT TIME RECORDS as gary mentions.

  But why?

Does Anybody Really Know What Time It Is?

 One of the things Gary emphasized most strongly in the DMG was time records have to be kept. And they must be accurate.

He was correct, of course.

But why? and what does this mean?