The TID is a ten digit number with an additional 1-5 digit marker.
For example, 1621607776-93736 is a BBO TID. Sometimes BBO represents the TID with the ten digit number last, for example 93736-1621607776 is the same TID. The preferred format is to the list the ten digit number first. When sorted, the TIDs will be in chronological order.
The first component of the TID, e.g. 1621607776, is the ten digit time stamp. This is the number of seconds since January 1, 1970. This is also known as the Unix epoch. For non-computer programmers this may seem strange, but this is a common time stamp in computer programming (at least since 1970!). The second component (93736) is a monotonically increasing number that resets to 1 when it reaches 99999. For example, the next tournament/event that BBO creates will have the 5 digit number 93737.
Example: let's say that 50 events are starting at 1pm, they will all have the same time stamp, but each will have a unique 1-5 digit number. The combination of time-stamp and 1-5 digit number creates a unique reference to a BBO event.
To convert the time stamp to "real" time (and the other way round), use a web site such as: https://www.epochconverter.com.
For example, 1621607776 is Friday, May 21, 2021 2:36:16 PM (GMT).
You can use the time field to help search for a player.
For example, https://www.bridgebase.com/myhands/hands.php?username=bumportant&start_time=1619582400&end_time=1622174400 will retrieve one month of Eric Rodwell's data from start_time=1619582400 (April 28, 2021) to end_time=1622174400 (May 28, 2021).
Once you have a TID, you can use it to find a session/event.
For example: https://webutil.bridgebase.com/v2/tview.php?t=93736-1621607776 Note in this example, the 5 digit number has to appear first.