in lib/rssfeed.js [65:72]
function rssDate (d) {
const date = new Date(d)
const month = date.getMonth() + 1
const monthd = (month < 10 ? '0' : '') + month
const dayinmonth = (date.getDate() < 10 ? '0' : '') + date.getDate()
//we need this kind of format 2023-09-01T00:00:00Z
return date.getFullYear() + '-' + monthd + '-' + dayinmonth + 'T00:00:00Z'
}