Mother usually knows the time bang-on even without looking at a clock. I always wondered how. And we generally tell the time using the amount of sun that we see or don't see.
And i used to do it here too, for the last couple of weeks. But now, i've to remind myself that Munich is one hour ahead than before. I don't realise this until i see a watch. Even as i type, i see the clock on my table and tell myself that i have a few more hours to go before sleeping time.