Sun Mon Tue Wed Thu Fri Sat
1
May Day, a cross quarter day.
May Day, a cross quarter day.
May 1 all-day
May Day is a public holiday usually celebrated on 1 May. It is an ancient Northern Hemisphere spring festival and a traditional spring holiday in many cultures. Dances, singing, and cake are usually part of the festivities. In the late 19th century, May Day was chosen as the Continue reading →
3
4
Eta-Aquariid Meteor Shower.
Eta-Aquariid Meteor Shower.
May 4 all-day
Eta-Aquariid Meteor Shower.
Eta-Aquariids Meteor Shower Next period of activity: April 19th, 2020 to May 28th, 2020 Peak: May 5-6, 2020 – the moon will be 1% illuminated. The Eta Aquariids are a strong shower when viewed from the southern tropics. From the Continue reading →
Mercury at Superior Conjunction.
6
7
Full Moon (03:45 MST).
Full Moon (03:45 MST).
May 7 all-day
Full Moon (03:45 MST).
Full Moon. Rises at sunset, high in the sky around midnight. Visible all night. Moon overview on solarsystem.nasa.gov
8
12
13
14
16
Armed Forces Day.
Armed Forces Day.
May 16 all-day
 
Feast of St. Brendan, patron of navigators who steer by celestial bodies. 
International Day of Light.
International Day of Light.
May 16 all-day
International Day of Light.
The International Day of Light is a global initiative that provides an annual focal point for the continued appreciation of light and the role it plays in science, culture and art, education, and sustainable development, and in fields as diverse Continue reading →
19
20
World Metrology Day.
World Metrology Day.
May 20 all-day
World Metrology Day.
me·trol·o·gy   /məˈträləjē/   noun    The scientific study of measurement.  
21
22
Mercury at 0.9° of Venus.
New Moon (10:39 MST).
New Moon (10:39 MST).
May 22 all-day
New Moon (10:39 MST).
By the modern definition, New Moon occurs when the Moon and Sun are at the same geocentric ecliptic longitude. The part of the Moon facing us is completely in shadow then. Pictured here is the traditional New Moon, the earliest visible Continue reading →
23
24
25
Memorial Day.
Memorial Day.
May 25 all-day
 
Towel Day – 42nd anniversary of the first BBC broadcast of the Hitchhiker’s guide to the galaxy.
Towel Day – 42nd anniversary of the first BBC broadcast of the Hitchhiker’s guide to the galaxy.
May 25 all-day
Towel Day - 42nd anniversary of the first BBC broadcast of the Hitchhiker's guide to the galaxy.
Towel Day is an annual celebration on the 25th of May, as a tribute to the late author Douglas Adams (1952-2001). On that day, fans around the universe carry a towel in his honor. Towel Day 2020 will be special as Continue reading →
26
27
28
29
30

Milky Way Behind The Lighthouse of Plemmirio – Syracuse, Sicily, by Dario Giannobile, Italy. The Milky Way rises like a giant cloud over the Plemmirio Lighthouse in Sicily.