If you ever play sessions over midnight you will probably want the date filters to include those whole sessions as part of the previous day.
To do this you configure My Day Starts At to a time you never play, such as 5am. This tells PT3 to include all sessions played between 5am one day and 5am the next as part of the same 'day', using the date of the start of the 'day'.
Let's say you play 4 sessions on 15 March 2009 and into 16 March.
1. 2pm till 5pm
2. 7pm till 8pm
3. 11.30pm till 12.30am (on the 16th)
4. 1am till 2am (on the 16th)
If you leave 'My Day Starts At' set to midnight and filter to a single date (09/03/15) then 3 of the sessions will be included in the filter because they start on the 15th (reports showing session results show the whole session), but if you look at a report showing individual hands it will only show the hands played up until midnight (2 1/2 sessions).
This can lead to a discrepency between what you see in the different tabs; i.e. between session-based reports and hand-based reports.
If instead you set 'My Day Starts At' to 5am then all the reports will filter to the complete 4 sessions (because they are all played between 5am on the 15th and 5am on the 16th.)
Select your preferred time from the My Day Starts At dropdown list: