Starmap1931

Every Celestial Event Mapped to the Millisecond

Swiss Ephemeris (DE441) resolves every event to the millisecond.

Engine cross-checked against NASA JPL HORIZONS - The model that flies spacecraft.

Every other almanac stops at the minute. We get it EXACT.

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1931 had 13 full moons and 5 eclipses. The eclipses fell: a total lunar eclipse in Libra on April 2, a partial solar eclipse in Aries on April 17, a partial solar eclipse in Virgo on September 12, a total lunar eclipse in Aries on September 26, and a partial solar eclipse in Libra on October 11. Mercury turned retrograde three times (Apr 19 to May 13; Aug 22 to Sep 14; Dec 11 to Dec 31). The first full moon rose in Cancer on January 4. May saw two full moons, a blue moon. Every full moon, new moon, solar and lunar eclipse, equinox, solstice, planetary ingress, and retrograde station below is computed to the millisecond with the NASA-cross-checked Swiss Ephemeris engine and shown in Eastern Time - Choose your location on the page for your own sky.

January 1931

February 1931

March 1931

April 1931

May 1931

June 1931

July 1931

August 1931

September 1931

October 1931

November 1931

December 1931

Browse Every Year - 1900 to 2099

Two full centuries of the sky, each year computed to the millisecond - every full moon, eclipse, equinox, solstice, ingress, and retrograde station. Look up the sky on any birthday.

1900s
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1910s
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1920s
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1930s
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2020s
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2030s
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1931 Celestial Events - Frequently Asked Questions

STARMAP is the most precise 1931 astrology calendar on the web - Every event of the year to the millisecond, in your own timezone and your own sky. The answers below come straight from the data.

What were the 1931 eclipse dates and times?

1931 had 5 eclipses: Total Lunar Eclipse on ; Partial Solar Eclipse on ; Partial Solar Eclipse on ; Total Lunar Eclipse on ; Partial Solar Eclipse on . Every instant lands on the millisecond - Times mark the exact lunation instant of each eclipse.

When were the 1931 solstices and equinoxes?

Spring Equinox: ; Summer Solstice: ; Autumn Equinox: ; Winter Solstice: .

When was Mercury retrograde in 1931?

Mercury stationed retrograde 3 times in 1931: , , . The exact station instants are on the calendar above.

How many full moons were there in 1931?

1931 had 13 full moons. The first was the Full Moon in Cancer on .

How accurate are these celestial event times?

Every event is computed with the Swiss Ephemeris (DE441) and resolved to the millisecond. The engine is verified against NASA JPL HORIZONS - The model that flies spacecraft - On the 2026 major events. Almanacs stop at the minute. Starmap does not. Positions for this pre-atomic era are exact; the clock-time mapping is good to about a second.