Calculate a passenger's age at first travel

To work out the age of a passengers when they first travel all you need to do, from anywhere in Pegasus is press Shift+F8 / 9 which is the 'Calculate age at first travel' option.

From here you enter the date of the first flight (as stated) and the date of birth of the passenger in question and Pegasus will give you the age of the passenger upon travel together with the appropriate identifier at the bottom of the screen like this:

Useful to figure out if an infant is going to hit the dreaded 'child turns 2 mid-travel' scenario!