dateregex.go

package main

import (
    "regexp"
    "fmt"
)

func main() {
    var re = regexp.MustCompile(`(\b(0?[1-9]|[12]\d|30|31)[^\w\d\r\n:](0?[1-9]|1[0-2])[^\w\d\r\n:](\d{4}|\d{2})\b)|(\b(0?[1-9]|1[0-2])[^\w\d\r\n:](0?[1-9]|[12]\d|30|31)[^\w\d\r\n:](\d{4}|\d{2})\b)
`)
    var str = `14-3-17`
    
    for i, match := range re.FindAllString(str, -1) {
        fmt.Println(match, "found at index", i)
    }
}