When you get to the end of the week, do you think “What have I done this week?”?
When you come to fill in a timesheet, do you completely forget what you did in the week?
When you’ve closed a task, do you think, I wish there was an easy way back to that task?
History is the answer to all those questions, and it works in a similar way to your Internet Browser. If you’ve created it, read it, or updated it, there will be a record for the last time for each day.