Every ingress of the Sun and planets, chronologically, with the exact UTC instant. Retrograde re-entries are marked.
In 1901 the Sun and planets change signs 48 times. Outer-planet ingresses: Jupiter enters Capricorn on Jan 19, 1901, 08:33 UTC; Neptune enters Cancer on Jul 19, 1901, 23:57 UTC; Neptune enters Gemini on Dec 25, 1901, 13:30 UTC (retrograde re-entry).
| Instant (UTC) | Planet | From | Into |
|---|---|---|---|
| Jan 2, 1901, 12:27 UTC | ☿ Mercury | Sagittarius | Capricorn |
| Jan 16, 1901, 11:29 UTC | ♀ Venus | Sagittarius | Capricorn |
| Jan 19, 1901, 08:33 UTC | ♃ Jupiter | Sagittarius | Capricorn |
| Jan 20, 1901, 17:17 UTC | ☉ Sun | Capricorn | Aquarius |
| Jan 21, 1901, 06:30 UTC | ☿ Mercury | Capricorn | Aquarius |
| Feb 7, 1901, 10:35 UTC | ☿ Mercury | Aquarius | Pisces |
| Feb 9, 1901, 13:06 UTC | ♀ Venus | Capricorn | Aquarius |
| Feb 19, 1901, 07:45 UTC | ☉ Sun | Aquarius | Pisces |
| Mar 1, 1901, 19:28 UTC | ♂ Mars ℞ | Virgo | Leo |
| Mar 5, 1901, 14:51 UTC | ♀ Venus | Aquarius | Pisces |
| Mar 21, 1901, 07:23 UTC | ☉ Sun | Pisces | Aries |
| Mar 29, 1901, 18:03 UTC | ♀ Venus | Pisces | Aries |
| Apr 15, 1901, 17:10 UTC | ☿ Mercury | Pisces | Aries |
| Apr 20, 1901, 19:13 UTC | ☉ Sun | Aries | Taurus |
| Apr 22, 1901, 23:34 UTC | ♀ Venus | Aries | Taurus |
| May 3, 1901, 13:58 UTC | ☿ Mercury | Aries | Taurus |
| May 11, 1901, 06:05 UTC | ♂ Mars | Leo | Virgo |
| May 17, 1901, 07:34 UTC | ♀ Venus | Taurus | Gemini |
| May 17, 1901, 20:08 UTC | ☿ Mercury | Taurus | Gemini |
| May 21, 1901, 19:04 UTC | ☉ Sun | Taurus | Gemini |
| Jun 1, 1901, 23:35 UTC | ☿ Mercury | Gemini | Cancer |
| Jun 10, 1901, 17:37 UTC | ♀ Venus | Gemini | Cancer |
| Jun 22, 1901, 03:28 UTC | ☉ Sun | Gemini | Cancer |
| Jul 5, 1901, 05:22 UTC | ♀ Venus | Cancer | Leo |
| Jul 13, 1901, 19:59 UTC | ♂ Mars | Virgo | Libra |
| Jul 19, 1901, 23:57 UTC | ♆ Neptune | Gemini | Cancer |
| Jul 23, 1901, 14:24 UTC | ☉ Sun | Cancer | Leo |
| Jul 29, 1901, 19:13 UTC | ♀ Venus | Leo | Virgo |
| Aug 10, 1901, 04:45 UTC | ☿ Mercury | Cancer | Leo |
| Aug 23, 1901, 12:33 UTC | ♀ Venus | Virgo | Libra |
| Aug 23, 1901, 21:07 UTC | ☉ Sun | Leo | Virgo |
| Aug 25, 1901, 22:24 UTC | ☿ Mercury | Leo | Virgo |
| Aug 31, 1901, 18:13 UTC | ♂ Mars | Libra | Scorpio |
| Sep 11, 1901, 06:21 UTC | ☿ Mercury | Virgo | Libra |
| Sep 17, 1901, 11:29 UTC | ♀ Venus | Libra | Scorpio |
| Sep 23, 1901, 18:09 UTC | ☉ Sun | Virgo | Libra |
| Oct 1, 1901, 04:35 UTC | ☿ Mercury | Libra | Scorpio |
| Oct 12, 1901, 19:15 UTC | ♀ Venus | Scorpio | Sagittarius |
| Oct 14, 1901, 12:47 UTC | ♂ Mars | Scorpio | Sagittarius |
| Oct 24, 1901, 02:46 UTC | ☉ Sun | Libra | Scorpio |
| Nov 7, 1901, 19:25 UTC | ♀ Venus | Sagittarius | Capricorn |
| Nov 22, 1901, 23:41 UTC | ☉ Sun | Scorpio | Sagittarius |
| Nov 24, 1901, 04:44 UTC | ♂ Mars | Sagittarius | Capricorn |
| Dec 5, 1901, 13:32 UTC | ♀ Venus | Capricorn | Aquarius |
| Dec 6, 1901, 23:38 UTC | ☿ Mercury | Scorpio | Sagittarius |
| Dec 22, 1901, 12:37 UTC | ☉ Sun | Sagittarius | Capricorn |
| Dec 25, 1901, 13:30 UTC | ♆ Neptune ℞ | Cancer | Gemini |
| Dec 26, 1901, 09:31 UTC | ☿ Mercury | Sagittarius | Capricorn |