Not about feminism.
In "The Age of Miracles", the characters are confronted with a object, a big change. And it is the character's job to adapt and overcome the change. This related to be because when I first came back to america after 7-8 years it was a pretty big change and I had to adapt.
The characters in "The Age of Miracles" aren't really adapting. They are just changing not in the good way. Everyone(there are exceptions) are panicking.
I don't have a view of the world and there nothing in the book that stands out to me that I consider wrong.
In the The Age of Miracles the earth is slowing down and the same is happening right now in our world(very slowly). I learned that from doing a bit of research. The text was good enough as entertainment.