const locale = 'en-GB'; // change this to your locale if you want a different date/time format module.exports = function (eleventyConfig) { eleventyConfig.addFilter('dateDisplay', date => new Date(date).toLocaleDateString(locale, { "dateStyle": "short" })); eleventyConfig.addFilter('dateTimeDisplay', date => new Date(date).toLocaleString(locale, { 'dateStyle': 'short', 'timeStyle': 'short', 'hourCycle': 'h12' })); eleventyConfig.addFilter('toDate', date => new Date(date)); }