The deadline has expired.
On December 26, we announced that December 31 was the last opportunity to upgrade to Windows 10 for free.
The deadline has expired.
On December 2017, we announced that December 2017 was the last opportunity to upgrade to Windows 10 for free.
Microsoft reports that you can no longer upgrade to Windows 10 for free.
Not many hours left - stay on the safe side
But Microsoft chose to give PC users with special needs even more time to upgrade free, ie until January 16th.
We are uncertain about the time zone question here, but to be absolutely sure you should upgrade tonight - you can upgrade from this page.