Definition & Meaning of "all and sundry"

What is the origin of the idiom "all and sundry" and when to use it?

The idiom "all and sundry" is an old English expression that dates back to at least the 16th century. It comes from the idea that something is open or available to "all" (everyone) and "sundry" (various or miscellaneous) people. This idiomatic expression is used to refer to a broad or diverse group of people, indicating that something is meant for or includes everyone without exception.