This is the most important aspect of the logbook. The pilot must record the exact moment of departure and the moment of arrival at the other airfield in order to accurately determine the duration of the flight.
This will count toward the total number of flight hours that will eventually be required for licenses and ratings, so accuracy is very important. Pilots often use Hobbs times and tachometer times to get fairly accurate flight times.
In some aircraft, the Hobbs counter is activated when the aircraft's main switch is turned on, while in others it is activated when the pressure switch connected to the landing gear is turned on. In the latter case, only the time when the aircraft is literally in flight is counted, while in the former case, the time is counted from the moment the engines are turned on.
On the other hand, the tachometer is related to the number of engine revolutions and gives much less accurate readings. Together, the Hobbs and tachometer readings give readings close to the actual flight time.
In this case, the time parameter is taken into account as a general parameter and does not affect any intermediate actions of the pilot. The use of a multi-function timer app might remedy the situation. Of course, you may need to pre-configure the timers, the timer groups and how the timers are interconnected to make the process effective, but the game is worth the candle.