3.19Dates

You don't need to become a DataWeave date guru before the interview.

Know this pattern.

Input:

{
  "created": "08/07/2026"
}

Convert:

payload.created as Date {format: "MM/dd/uuuu"}

You can then output it as:

(payload.created as Date {format: "MM/dd/uuuu"})
    as String {format: "uuuu-MM-dd"}

So:

08/07/2026

becomes:

2026-08-07

DataWeave uses as with format metadata for date parsing/formatting; its date modules also provide additional date manipulation functions.