Diana L. Paxson calls this Thirteenth Night or Threttandi, but I side with Kveldulf Gundarsson and call it Twelfth Night. In his book, Teutonic Religion, Gundarsson states that someone should remain awake all night until sunrise, presumably to awaken the others, to start the Rite of the New Year. Being a lone practitioner, and all my friends being either Christians or Atheists, I leave the festivities at one or two o'clock, set my alarm for five, and get some sleep. I am not young any more and doing an all-nighter would make me a little cranky for the ritual. Upon waking I compose myself and await the rising of Sunna. As Sunna slowly peeks over the rim of the world I raise my horn and say :
The wheel of the year has come full circle. The dawn of a new day and a new year is upon us. Great and powerful Sunna come and bless me, my people, and these lands on this day of new beginnings. Your light gives us both hope and joy, and warms up our hearts as well as our lands. We are blessed by your presence and drink this toast in your honor for all you do for us. Hail great giver of light and warmth ! Hail Sunna !
The old tradition is that you then pour some of the toast over the Yule wreath and burn it to signify the end of the old season. Make sure the, "proof", of the alcohol is high enough to ignite the dried wreath. Also, remember to write your own rite honoring Sunna. I cannot say it enough times, the Gods and Goddesses want to hear your words coming from your heart to praise Them, not mine or somebody elses.
Finally, I wish all of you a Happy Twelfth Night and a very Happy New Year !
May you live the New Year with Odin's wisdom, Freyja's love and Thor's protection !