ISO 8601 Date Regex

const regex = /\b\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])\b/g;
const result = str.match(regex);

import re
pattern = re.compile(r'\b\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])\b')
result = pattern.findall(text)

import "regexp"
re := regexp.MustCompile(`\b\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])\b`)
result := re.FindAllString(text, -1)