Yes. There are two ways to do this: On the Home screen choose Manage My History. Or go to Today and choose Manage My History. From here, you can select the day and time you need to update. 

The calendar view will tell you which days you logged your medications for. You can edit this anytime by clicking on a day in the calendar. 

A green circle means you have logged your medication for that day. A yellow circle means you have not logged all of your medications. And the white circle is today.