June 21 – June Solstice. The June solstice occurs at 05:04 UTC. The North Pole of the earth will be tilted toward the Sun, which will have reached its northernmost position in the sky and will be directly over the Tropic of Cancer at 23.44 degrees north latitude. This is the first day of summer (summer solstice) in the Northern Hemisphere and the first day of winter (winter solstice) in the Southern Hemisphere.
June 23 – Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 11:32 UTC. This full moon was known by early Native American tribes as the Full Strawberry Moon because it signaled the time of year to gather ripening fruit. It also coincides with the peak of the strawberry harvesting season. This moon has also been known as the Full Rose Moon and the Full Honey Moon.
Litha is usually celebrated on June 21st, but varies somewhat from the 20th to the 23rd, dependent upon the Earth’s rotation around the Sun. According to the old folklore calendar, Summer begins on Beltane (May 1st) and ends on Lughnassadh (August 1st), with the Summer Solstice midway between the two, marking MID-Summer. This makes more logical sense than suggesting that Summer begins on the day when the Sun’s power begins to wane and the days grow shorter. The most common other names for this holiday are the Summer Solstice or Midsummer, and it celebrates the arrival of Summer, when the hours of daylight are longest. The Sun is now at the highest point before beginning its slide into darkness.