April 20
April 20 is the 111th day of the year in the Gregorian calendar; 255 days remain until the year's end. It falls in spring (northern hemisphere) and under the astrological sign of Taurus.
External references
Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.
Astronomy
On April 20 the Sun's declination is approximately +11.6°. 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 April 20.
Position in the year
Holidays & observances
No widely-observed holidays catalogued for this day in our base set. See the external almanacs above for region-specific observances.
Events
A selection of widely-documented historical events that took place on this date. Years marked BCE follow standard astronomical convention.
- 1535 — Sun-dog phenomenon over Stockholm: a parhelion display was painted as the famous Vädersolstavlan. ↗(491 years ago)
- 1862 — Louis Pasteur and Claude Bernard completed the first test of the pasteurisation process. ↗(164 years ago)
- 1889 — Adolf Hitler was born in Braunau am Inn, Austria-Hungary. ↗(137 years ago)
- 1999 — Two students at Columbine High School in Colorado killed 12 students and a teacher before taking their own lives. ↗(27 years ago)
- 2010 — The Deepwater Horizon offshore oil rig exploded in the Gulf of Mexico, beginning the largest accidental marine oil spill in history. ↗(16 years ago)
Notable births
Notable deaths
- 1912 — Bram Stoker, Irish author (Dracula). ↗(114 years ago)
Numerical & calendrical curiosities
| Day-of-year (111) | 3 × 37 · composite (no) |
|---|---|
| Days remaining (255) | 3 × 5 × 17 |
| Date code DDMMYYYY | 20042026 · no palindrome in next 200 years |
| Sun declination | +11.57° (Cooper approximation) |
| Distance from solstice | 61 days |