Every ingress of the Sun and planets, chronologically, with the exact UTC instant. Retrograde re-entries are marked.
In 1971 the Sun and planets change signs 54 times. Outer-planet ingresses: Jupiter enters Sagittarius on Jan 14, 1971, 08:49 UTC; Jupiter enters Scorpio on Jun 5, 1971, 02:12 UTC (retrograde re-entry); Saturn enters Gemini on Jun 18, 1971, 16:08 UTC; Jupiter enters Sagittarius on Sep 11, 1971, 15:33 UTC; Pluto enters Libra on Oct 5, 1971, 06:18 UTC.
| Instant (UTC) | Planet | From | Into |
|---|---|---|---|
| Jan 2, 1971, 23:36 UTC | ☿ Mercury ℞ | Capricorn | Sagittarius |
| Jan 7, 1971, 01:00 UTC | ♀ Venus | Scorpio | Sagittarius |
| Jan 14, 1971, 02:16 UTC | ☿ Mercury | Sagittarius | Capricorn |
| Jan 14, 1971, 08:49 UTC | ♃ Jupiter | Scorpio | Sagittarius |
| Jan 20, 1971, 17:13 UTC | ☉ Sun | Capricorn | Aquarius |
| Jan 23, 1971, 01:34 UTC | ♂ Mars | Scorpio | Sagittarius |
| Feb 5, 1971, 14:57 UTC | ♀ Venus | Sagittarius | Capricorn |
| Feb 7, 1971, 20:51 UTC | ☿ Mercury | Capricorn | Aquarius |
| Feb 19, 1971, 07:27 UTC | ☉ Sun | Aquarius | Pisces |
| Feb 26, 1971, 07:57 UTC | ☿ Mercury | Aquarius | Pisces |
| Mar 4, 1971, 02:24 UTC | ♀ Venus | Capricorn | Aquarius |
| Mar 12, 1971, 10:11 UTC | ♂ Mars | Sagittarius | Capricorn |
| Mar 14, 1971, 04:46 UTC | ☿ Mercury | Pisces | Aries |
| Mar 21, 1971, 06:38 UTC | ☉ Sun | Pisces | Aries |
| Mar 29, 1971, 14:01 UTC | ♀ Venus | Aquarius | Pisces |
| Apr 1, 1971, 14:11 UTC | ☿ Mercury | Aries | Taurus |
| Apr 18, 1971, 21:52 UTC | ☿ Mercury ℞ | Taurus | Aries |
| Apr 20, 1971, 17:54 UTC | ☉ Sun | Aries | Taurus |
| Apr 23, 1971, 15:44 UTC | ♀ Venus | Pisces | Aries |
| May 3, 1971, 20:58 UTC | ♂ Mars | Capricorn | Aquarius |
| May 17, 1971, 03:32 UTC | ☿ Mercury | Aries | Taurus |
| May 18, 1971, 12:48 UTC | ♀ Venus | Aries | Taurus |
| May 21, 1971, 17:15 UTC | ☉ Sun | Taurus | Gemini |
| Jun 5, 1971, 02:12 UTC | ♃ Jupiter ℞ | Sagittarius | Scorpio |
| Jun 7, 1971, 06:45 UTC | ☿ Mercury | Taurus | Gemini |
| Jun 12, 1971, 06:57 UTC | ♀ Venus | Taurus | Gemini |
| Jun 18, 1971, 16:08 UTC | ♄ Saturn | Taurus | Gemini |
| Jun 21, 1971, 16:25 UTC | ☿ Mercury | Gemini | Cancer |
| Jun 22, 1971, 01:20 UTC | ☉ Sun | Gemini | Cancer |
| Jul 6, 1971, 08:53 UTC | ☿ Mercury | Cancer | Leo |
| Jul 6, 1971, 22:02 UTC | ♀ Venus | Gemini | Cancer |
| Jul 23, 1971, 12:14 UTC | ☉ Sun | Cancer | Leo |
| Jul 26, 1971, 17:03 UTC | ☿ Mercury | Leo | Virgo |
| Jul 31, 1971, 09:15 UTC | ♀ Venus | Cancer | Leo |
| Aug 23, 1971, 19:16 UTC | ☉ Sun | Leo | Virgo |
| Aug 24, 1971, 16:25 UTC | ♀ Venus | Leo | Virgo |
| Aug 29, 1971, 20:41 UTC | ☿ Mercury ℞ | Virgo | Leo |
| Sep 11, 1971, 06:45 UTC | ☿ Mercury | Leo | Virgo |
| Sep 11, 1971, 15:33 UTC | ♃ Jupiter | Scorpio | Sagittarius |
| Sep 17, 1971, 20:25 UTC | ♀ Venus | Virgo | Libra |
| Sep 23, 1971, 16:45 UTC | ☉ Sun | Virgo | Libra |
| Sep 30, 1971, 09:19 UTC | ☿ Mercury | Virgo | Libra |
| Oct 5, 1971, 06:18 UTC | ♇ Pluto | Virgo | Libra |
| Oct 11, 1971, 22:42 UTC | ♀ Venus | Libra | Scorpio |
| Oct 17, 1971, 17:49 UTC | ☿ Mercury | Libra | Scorpio |
| Oct 24, 1971, 01:53 UTC | ☉ Sun | Libra | Scorpio |
| Nov 5, 1971, 00:31 UTC | ♀ Venus | Scorpio | Sagittarius |
| Nov 6, 1971, 06:59 UTC | ☿ Mercury | Scorpio | Sagittarius |
| Nov 6, 1971, 12:31 UTC | ♂ Mars | Aquarius | Pisces |
| Nov 22, 1971, 23:14 UTC | ☉ Sun | Scorpio | Sagittarius |
| Nov 29, 1971, 02:41 UTC | ♀ Venus | Sagittarius | Capricorn |
| Dec 22, 1971, 12:24 UTC | ☉ Sun | Sagittarius | Capricorn |
| Dec 23, 1971, 06:33 UTC | ♀ Venus | Capricorn | Aquarius |
| Dec 26, 1971, 18:05 UTC | ♂ Mars | Pisces | Aries |