Define working - is it actual work or sitting at computer on standby not getting paid for sitting?
Monday I did ~3 hours of actual (paid) work, yesterday ~2.5 hours, last Friday ~3.5 hours (though some of that at very slow pace waiting for slow server), I'm usually not paid by hours (besides those slow on server tasks).
I sit at my computer roughly between 8-15 on standby (minus usual lunch break walking those 8 meters to kitchen) unless I go to pick some paper at doctor, going to dentist tomorrow, etc.
Moving clocks surely Fcks my schedule twice a year, since my client is from country, which doesn't observe this European/Northamerican DST nonsense.