HTC One M9 Android 7.0 Nougat roll-out commences across several regions

HTC's Product and Service Director Graham Wheeler is the closest source to the action, and along with the tweet below outlining the update, he later added that "more countries [will] follow over the coming days."

HTC One M9 is the latest beneficiary of Android 7.0 Nougat
So, if you are rocking the HTC One M9 and have been waiting patiently to dive into Nougat, you won't be left sitting on your hands for much longer. You'll be pinged when the update is primed and ready for your device and if you'd like to take a more proactive stance, you can check manually by going to Settings --> About --> Software updates --> Check now on your device.
source: Graham Wheeler via HTCSource