getMonth.js

/**
 * Get the numeric equivalent of an English (shortened) month name
 *
 * It's best to keep the English version in the element's data
 * attribute when dealing with translatable strings.
 *
 * @param monthStr long or short month name
 * @returns {number} month's integer equivalent (1-12)
 */
function getMonth(monthStr){
    return new Date('1 ' + monthStr + ' 2001').getMonth() + 1
}