We use any and every to talk about the total numbers of things in a group. Their meanings are not exactly the same:
Any doctor can prescribe medicine. (or Everydoctor can …)
Every always refers to the total number of something. Any refers to one, several or all of a total number. We use every not any with singular countable nouns when we mean ‘each individual member of a group of something’.
You can come over for dinner any evening.
It doesn’t matter which one, or you can come every evening.