so.... what is a session?
if you have a break or change kite sizes does that make it another session? or is it times to the beach?
One can always define a session like one wants.
In my eyes, a "session" is times to the beach, where you pack everything down again when you leave.
No matter if using 3 or 4 kitesizes that day, or one, change boards, or if you ride from one spot to another, and back again (on the water), or take an upwinder or downwinder to another spot and get a lift back maybe - I still count it as "one" session.
Only if I pack down and go to another spot and rig my kite(s) again, even on the same day, I would count it as two sessions.
Does not happen often though...
But I might be on vacation on an Island in the summer and go out in the morning or till midday - then take the ferry to the mainland - and on my way back home drive to a good wavespot if the wind is right, and kite in the evening.
This is two sessions in my definition
In the summertime here, the sun rises between 4 and 4:30 and sets around 22:30 so sunny more than 18 hours, and typically okay "light" to kite between 3 and midnight so more than 20 possible hours one can kitesurf
In the winther it is worse though, as less than 7 hours with daylight, and every single one when most are at work (sun up 9 to 15:45), so only weekends where you can kite (unless it is -15 degrees).
If one lives right next to the beach though - each DAY out should be counted as one session, if it should be comparable - even if you go home after another kitesize or boards, or are out many times the same day (at the same spot).
I have a large number of yearly sessions though - and dont know if this is good really
As honestly, less and better sessions would be the goal IMO