Daina shows one Latvian folk song in the morning and another after sunset. The switch follows sunrise and sunset in Riga, worked out on the phone itself, and everyone gets the same song on the same day.
Around Jāņi, Veļu laiks or Ziemassvētki the songs come from that festival, and otherwise from the season. You can look back over the last seven days and keep the ones you like. The song of the moment is also on your Home Screen and Lock Screen.