Advance Notification Regarding Upgrade Availability Dates

[江口太]

There's an upcoming Australia upgrade.

Is there any way to get advance email notifications about when such upgrades become available?

If so, could you tell me who receives these notifications and how far in advance?

Any reference articles would be even better!

Thank you.

[江口太]

From this article, I understand who the recipients are.
Next, I want to confirm when the upgrade availability date will be notified in advance. 
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