Time slowed down

I noticed a strange time behaviour when flying a trip in Italy the other day. It was a bit late, so I set time manually to 16.30 local time to get the dusk during flight.
The trip lasted 1,5 hour approx, but when I landed the sim time was only 17.05. Seems the sim slowed time speed to 1/3 by setting time maually.
Traffic on roads seemed normal, so it was not simulation rate related.

Jumped a time zone?

Could add up… Ill try another run later on

Check your sim rate you can adjust this by holding down (in this order)
R then LEFT CTRL then numpad + or -
watch your UTC clock in the cockpit if seconds are not normal increase or decrease

It was not related to sim-rate.

was it TZ crossover?