As CAM said, all over the place in the US as well and a bit of a lottery.
Since my county is now making it available to those 65 and older, I put my name down on my healthcare system's online appointments list and was told mid-February at the earliest.
Then saw something called the San Ramon Fire Protection District about 12 miles away was offering online appointments for two coming Sundays for those 65+ so signed up. Was told I was on their waiting list and then a day or so later they offered me an appointment (presumably because of a cancellation.)
I go on Sunday 24 - my wife as well.
I'll believe it when I see it..(going into my arm.)