docs: def index(request, page):
      """Show the index page or any an offset of it."""
      days = []
      days_found = set()
      query = Entry.query.order_by(Entry.pub_date.desc())
      pagination = Pagination(query, PER_PAGE, page, "index")
      for entry in pagination.entries:
          day = date(*entry.pub_date.timetuple()[:3])
          if day not in days_found:
              days_found.add(day)
              days.append({"date": day, "entries": []})
          days[-1]["entries"].append(entry)
      return render_template("index.html", days=days, pagination=pagination)