text.html

<script>
  function r(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min + 1)) + min; //Максимум и минимум включаются
}

const m = r(7, 10)
const y = new Date().getFullYear() + 1
const d = r(1, 28)
const o = { year: 'numeric', month: 'long', day: 'numeric' }
const p1 = [new Date(y, m, d), new Date(y, m, d + 14)].map(d => d.toLocaleDateString('ru-RU', o)).join(' - ')

const m2 = r(2, 6)
const d2 = r(1, 28)
const p2 = [new Date(y, m2, d2), new Date(y, m2, d2 + 14)].map(d => d.toLocaleDateString('ru-RU', o)).join(' - ')


window.onload = () => { document.body.append(p1, document.createElement('br'), p2) }
</script>