If you are trying to find a ‘To Do Today’ page that is older than the current month being displayed, you can either backtrack using the month tab or use the Search field at the top of the page.
The current month is shown in the tab section on the right hand side of the ‘To Do Today’ page. To navigate forward or backwards use the month tabs at the top and bottom of the current month tabs. Another more simpler way is to use the Search field. Enter the date in a common format (1/8/2013) or even just a text entry that you may be trying to find and it will come up in the list of search results.