We've already gotten word that the Windows 10 rollout is underway in countries where the date has already ticked over to July 29. However, Spanish blog Microsoftinsider.es has been able to confirm that the rollout is starting promptly as the clock ticks over to 12 a.m. in each country.
The confirmation came from an interview with Ramón Planet, the product manager for Microsoft Spain. While it isn't all that surprising, it does confirm that Windows Insiders and some of those who signed up to reserve their copy of Windows 10 will be able to start their upgrade as the clock ticks over to midnight.
In the U.S., however, things may come a little sooner depending on your time zone. We expect that Windows 10 will become available for U.S. users at 12 a.m. ET/9 p.m. PT. If you're a Windows Insider member, you'll be able to snag your download tonight. Everyone else who reserved their copy will see it roll out in waves over the next days, and possibly weeks.