Every ingress of the Sun and planets, chronologically, with the exact UTC instant. Retrograde re-entries are marked.
In 1931 the Sun and planets change signs 48 times. Outer-planet ingresses: Jupiter enters Leo on Jul 17, 1931, 07:51 UTC.
| Instant (UTC) | Planet | From | Into |
|---|---|---|---|
| Jan 3, 1931, 20:03 UTC | ♀ Venus | Scorpio | Sagittarius |
| Jan 21, 1931, 00:17 UTC | ☉ Sun | Capricorn | Aquarius |
| Feb 6, 1931, 12:24 UTC | ♀ Venus | Sagittarius | Capricorn |
| Feb 11, 1931, 12:27 UTC | ☿ Mercury | Capricorn | Aquarius |
| Feb 16, 1931, 14:27 UTC | ♂ Mars ℞ | Leo | Cancer |
| Feb 19, 1931, 14:40 UTC | ☉ Sun | Aquarius | Pisces |
| Mar 2, 1931, 17:28 UTC | ☿ Mercury | Aquarius | Pisces |
| Mar 5, 1931, 21:45 UTC | ♀ Venus | Capricorn | Aquarius |
| Mar 18, 1931, 19:31 UTC | ☿ Mercury | Pisces | Aries |
| Mar 21, 1931, 14:06 UTC | ☉ Sun | Pisces | Aries |
| Mar 30, 1931, 03:47 UTC | ♂ Mars | Cancer | Leo |
| Mar 31, 1931, 19:04 UTC | ♀ Venus | Aquarius | Pisces |
| Apr 3, 1931, 13:37 UTC | ☿ Mercury | Aries | Taurus |
| Apr 21, 1931, 01:39 UTC | ☉ Sun | Aries | Taurus |
| Apr 26, 1931, 02:10 UTC | ♀ Venus | Pisces | Aries |
| May 21, 1931, 02:38 UTC | ♀ Venus | Aries | Taurus |
| May 22, 1931, 01:16 UTC | ☉ Sun | Taurus | Gemini |
| Jun 10, 1931, 14:58 UTC | ♂ Mars | Leo | Virgo |
| Jun 11, 1931, 07:27 UTC | ☿ Mercury | Taurus | Gemini |
| Jun 14, 1931, 23:04 UTC | ♀ Venus | Taurus | Gemini |
| Jun 22, 1931, 09:28 UTC | ☉ Sun | Gemini | Cancer |
| Jun 26, 1931, 13:49 UTC | ☿ Mercury | Gemini | Cancer |
| Jul 9, 1931, 15:35 UTC | ♀ Venus | Gemini | Cancer |
| Jul 10, 1931, 19:56 UTC | ☿ Mercury | Cancer | Leo |
| Jul 17, 1931, 07:51 UTC | ♃ Jupiter | Cancer | Leo |
| Jul 23, 1931, 20:22 UTC | ☉ Sun | Cancer | Leo |
| Jul 28, 1931, 23:24 UTC | ☿ Mercury | Leo | Virgo |
| Aug 1, 1931, 16:37 UTC | ♂ Mars | Virgo | Libra |
| Aug 3, 1931, 03:29 UTC | ♀ Venus | Cancer | Leo |
| Aug 24, 1931, 03:10 UTC | ☉ Sun | Leo | Virgo |
| Aug 27, 1931, 10:42 UTC | ♀ Venus | Leo | Virgo |
| Sep 17, 1931, 08:43 UTC | ♂ Mars | Libra | Scorpio |
| Sep 20, 1931, 14:15 UTC | ♀ Venus | Virgo | Libra |
| Sep 24, 1931, 00:24 UTC | ☉ Sun | Virgo | Libra |
| Oct 4, 1931, 18:27 UTC | ☿ Mercury | Virgo | Libra |
| Oct 14, 1931, 15:45 UTC | ♀ Venus | Libra | Scorpio |
| Oct 22, 1931, 02:08 UTC | ☿ Mercury | Libra | Scorpio |
| Oct 24, 1931, 09:15 UTC | ☉ Sun | Libra | Scorpio |
| Oct 30, 1931, 12:46 UTC | ♂ Mars | Scorpio | Sagittarius |
| Nov 7, 1931, 16:32 UTC | ♀ Venus | Scorpio | Sagittarius |
| Nov 10, 1931, 04:27 UTC | ☿ Mercury | Scorpio | Sagittarius |
| Nov 23, 1931, 06:25 UTC | ☉ Sun | Scorpio | Sagittarius |
| Dec 1, 1931, 17:29 UTC | ♀ Venus | Sagittarius | Capricorn |
| Dec 2, 1931, 00:00 UTC | ☿ Mercury | Sagittarius | Capricorn |
| Dec 10, 1931, 03:10 UTC | ♂ Mars | Sagittarius | Capricorn |
| Dec 20, 1931, 07:59 UTC | ☿ Mercury ℞ | Capricorn | Sagittarius |
| Dec 22, 1931, 19:30 UTC | ☉ Sun | Sagittarius | Capricorn |
| Dec 25, 1931, 19:44 UTC | ♀ Venus | Capricorn | Aquarius |