May 18
May 18 is the 139th day of the year in the Gregorian calendar; 227 days remain until the year's end. It falls in spring (northern hemisphere) and under the astrological sign of Taurus.
Day of year
139
Days remaining
227
ISO week
20
Zodiac
Taurus
Season
Spring
Sun declination
+19.7°
External references
Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.
Wikipedia: this day →Britannica: this day →LoC: Today in History →History.com: this day →On-This-Day.com →BBC: On This Day →NYT: this day →Time and Date →NASA APOD archive →U.S. Naval Observatory →Wolfram|Alpha →Wikidata →Google Books →JSTOR →Internet Archive →
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Astronomy
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).
On May 18 the Sun's declination is approximately +19.7°. At this latitude the Sun is north of the celestial equator, giving the Northern Hemisphere longer days than nights.
For specific rise/set times at your location, see the U.S. Naval Observatory, or the NASA APOD archive for any imagery published on a May 18.
Position in the year
Holidays & observances
- International Museum Day
Events
A selection of widely-documented historical events that took place on this date. Years marked BCE follow standard astronomical convention.
- 1804 — Napoleon Bonaparte was proclaimed Emperor of the French by the French Senate. ↗(222 years ago)
- 1860 — The Republican National Convention nominated Abraham Lincoln for the U.S. presidency. ↗(166 years ago)
- 1953 — Jacqueline Cochran became the first woman to break the sound barrier. ↗(73 years ago)
- 1980 — Mount St. Helens in Washington state erupted, killing 57 and devastating the surrounding landscape. ↗(46 years ago)
Notable births
Notable deaths
- 1995 — Elisha Cook Jr., American actor. ↗(31 years ago)
Numerical & calendrical curiosities
| Day-of-year (139) | 139 · prime |
|---|---|
| Days remaining (227) | 227 |
| Date code DDMMYYYY | 18052026 · no palindrome in next 200 years |
| Sun declination | +19.70° (Cooper approximation) |
| Distance from solstice | 33 days |