When will the official version of Windows 10 be upgraded?

We have got the news that in the country where the date reached 29, Windows 10 push has begun. However, the Spanish blog Microsoftinsider.es confirmed that the push will start immediately at 0 o'clock in midnight every country clock.

This confirmation came from an interview with Microsoft's Spanish product manager Ram ó n Planet. Although the news was not entirely unexpected, it did confirm that members of the Windows Preview Experience and users who booked Windows 10 could start their upgrade from midnight.
But in the US, the push may be earlier, depending on your time zone. We expect Windows 10 to be available to US users at 00 pm on the 29th ET/28 at 21pm. If you are a member of the Windows Preview Experience, you should already be able to download Windows 10.