Makes absolute sense!
Thank you, Pils for this explanation and enlightening insights.
I was not aware of the degree of "intelligence" this plane demonstrates.... It is very rare that I touch the date settings when starting a flight, unless I need to see snow and ice....
However it seems not to be possible to update the date after loading a saved state and changing it in the flight settings to save it then. I have tried, but when resuming nothing changed (probably why it is called "resume"...).
But also a "start new flight" after changing the date AND location did not get rid of the MARCH indication.
It seems I have to restart the whole procedure and use today´s date, then save a few states for backup purposes, like Cold and Dark, APU running, ready for engine start etc.pp.
Again, thank you for your help, Pils, and have a great weekend with family and friends.
Cheers
Juergen