[Hamuko]

Not everything in the free tier expires after 12 months. Some remain always free.

Even now you should be getting 1 GB of free out traffic on your older-than-12-months AWS account.

[staticassertion]

I found it very unclear because the next section explicitly states that, in the case of Cloudfront traffic, it won't age out. But they don't make that statement about the regional traffic.

[Hamuko]

I'm guessing that's because the regional traffic never aged out before.