This info is from the annual WellBeing Astrology Guide, which includes my detailed year ahead horoscopes.
Dates of Change
You may have noticed that the start and finish dates for each Sun sign vary depending on which book or magazine you happen to be reading. This is because the Sun moves from one sign to the next when ready, not simply at midnight for our convenience! The Sun’s heavenly journey is continuous; we simply note when he passes from one zodiac sign to the next. This can happen at any time of day or night, approximately 30 days from when it last changed signs.
In 2015, sign changes for the Sun are:
| Sun into | Sydney | London | New York |
| Aquarius | 8.44pm January 20 |
9.44am January 20 | 4.44am January 20 |
| Pisces | 10.50am February 19 |
11.50pm February 18 | 6.50pm February 18 |
| Aries Equinox |
9.46am March 21 | 10.46pm March 20 | 6.46.pm March 20 |
| Taurus | 7.42pm April 20 | 10.42am April 20 | 5.42am April 20 |
| Gemini | 6.45pm May 21 | 9.45am May 21 | 4.45am May 21 |
| Cancer Solstice |
2.38am June 22 | 5.38pm June 21 | 12.38pm June 21 |
| Leo | 1.31pm July 23 | 4.31am July 23 | 11.31pm July 22 |
| Virgo | 8.38pm August 23 | 11.38am August 23 | 6.38am August 23 |
| Libra Equinox |
6.21pm September 23 | 9.21am September 23 | 4.21am September 23 |
| Scorpio | 4.47am October 24 | 6.47pm October 23 | 1.47pm October 23 |
| Sagittarius | 2.26am November 23 | 3.26pm November 22 | 10.26am November 22 |
| Capricorn Solstice |
3.48pm December 22 | 4.48am December 22 | 11.48pm December 21 |
If you are born 24 hours either side of the day on which the Sun changes sign (remember, the table above refers only to 2015), it’s important to have an astrologer verify your Sun sign. Being born on the cusp is not relevant because you cannot be “sort of Aries but sort of Taurus”. The Sun is either in Aries or in Taurus. There is no zodiacal black hole where the Sun spends time as he moves from one sign to the next.