• International Chernobyl Disaster Remembrance Day

    An explosion at the Chernobyl Nuclear Power Plant in 1986 spread a radioactive cloud over large parts of the Soviet Union; millions of people in the three countries were exposed to the radiation.

  • World Day for Safety and Health at Work

    The World Day for Safety and Health at Work will focus on addressing the outbreak of infectious diseases at work, in particular, on the COVID-19 pandemic.

  • Last Quarter Moon

    The Moon is at Last Quarter (or Third Quarter) – rising around midnight, and visible to the south after sunrise.

  • Cinco de Mayo

    Mother's Day in the United States is an annual holiday celebrated on the second Sunday in May. Mother's Day recognizes mothers, motherhood and maternal bonds in general, as well as the positive contributions that they make to society. It was established by Anna Jarvis, with the first official Mother's Day celebrated through a service of worship at St. Andrew's Methodist […]

  • Eta-Aquariid Meteor Shower

    The Eta Aquariids are a strong shower when viewed from the southern tropics. From the equator northward, they usually only produce medium rates of 10-30 per hour just before dawn. […]

  • Ascension

    The Ascension Day of Jesus Christ always falls on a Thursday - it is the day when Christians celebrate the ascension of Jesus Christ into heaven as recorded in the […]

  • Mother’s Day (USA)

    Mother's Day in the United States is an annual holiday celebrated on the second Sunday in May. Mother's Day recognizes mothers, motherhood and maternal bonds in general, as well as the […]

  • Conjunction of Uranus & the Sun

    Uranus will pass close to the Sun in the sky as its orbit carries it around the far side of the solar system from the Earth.

  • World Metrology Day.

    World Metrology Day is an annual celebration of the signature of the Metre Convention on 20 May 1875 by representatives of seventeen nations. The Convention set the framework for global […]

  • Full Moon

    Full Moon

    The Full Moon rises at sunset, and is visible all night. The Vatican Observatory's monthly Full Moon Meetup for Sacred Space Astronomy subscribers is held at 10:00 AM Tucson time.