This is basically the best worst kept secret in technology. Best,
because Apple never tells anyone. Worst, because, since iPhone 5,
Apple has announced every new iPhone during a special event held
the first or second Tuesday or Wednesday of September. […]
Now, past isn’t always predicate, but past events are the best
indicator for future events. Apple can and will throw curveballs
whenever the company’s logistics or strategy demands.
Still, based on the above pattern, it’s likely we’ll see this
year’s event on or around Wednesday, September 12.
Why? The first Tuesday of September is the 4th, and that’s far
earlier than Apple has held the event before. The second Tuesday
is the 11th, and September 11 is akin to a memorial day. That
leaves Wednesday the 12th or Thursday the 13th as the dates that
best fit the current pattern.