Why can't the array be sorted?

Question

go

There is an array of type Item:

type Item struct {
  Title       string `xml:"title"`
  Link        string `xml:"link"`
  Description string `xml:"description"`
  Date        string `xml:"pubDate"`
}

The Date field is stored like this: "Sat, 18 Feb 2017 16:40:05 +0300"
I'm trying to sort records by date like this:

func sortNews(feeds []Item) []Item {
  length := len(feeds)
  for i := 0; i < length-1; i++ {
    oneDate, _ := time.Parse(time.RFC1123Z, feeds[i].Date)
    for j := i+1; j < length; j++ {
      nextDate, _ := time.Parse(time.RFC1123Z, feeds[j].Date)
      b := nextDate.Before(oneDate)
      if b {
        trash := feeds[i].Date
        feeds[i].Date = feeds[j].Date
        feeds[j].Date = trash
      }
    }
  }

  return feeds
}

I checked. time.Parse works fine and correctly, but for some reason the array is not sorted