JSFiddle - React, Tailwind, and code Playground

by roberkules

JavaScript

var regex = {
  LAST_OF_MONTH: /^0 (0|1?[0-9]|2[0-3]) l \* \*$/
};

for (var i=-1; i< 30; ++i) {
	console.warn(i, regex.LAST_OF_MONTH.test(`0 ${i} l * *`));
}