Each month in detail
- January zodiac signs ♑︎ Capricorn about 19.3 days · ♒︎ Aquarius about 11.7 days
- February zodiac signs ♒︎ Aquarius about 17.9 days · ♓︎ Pisces about 10.3 days
- March zodiac signs ♓︎ Pisces about 19.7 days · ♈︎ Aries about 11.3 days
- April zodiac signs ♈︎ Aries about 19.2 days · ♉︎ Taurus about 10.8 days
- May zodiac signs ♉︎ Taurus about 20.1 days · ♊︎ Gemini about 10.9 days
- June zodiac signs ♊︎ Gemini about 20.5 days · ♋︎ Cancer about 9.5 days
- July zodiac signs ♋︎ Cancer about 21.9 days · ♌︎ Leo about 9.1 days
- August zodiac signs ♌︎ Leo about 22.2 days · ♍︎ Virgo about 8.8 days
- September zodiac signs ♍︎ Virgo about 22.1 days · ♎︎ Libra about 7.9 days
- October zodiac signs ♎︎ Libra about 22.5 days · ♏︎ Scorpio about 8.5 days
- November zodiac signs ♏︎ Scorpio about 21.3 days · ♐︎ Sagittarius about 8.7 days
- December zodiac signs ♐︎ Sagittarius about 20.9 days · ♑︎ Capricorn about 10.1 days
Average number of days of each month under each sign, counted to the minute in US Eastern time, 1930 to 2025.
Border days: when the year and hour decide
Seven months have two border days and five have three: January, March, June, October and November. The earliest border days of the year are February 18 and February 19; the latest are October 22, October 23 and October 24. The Sun does not move through the zodiac at an even pace, so the signs differ in length and the change does not land on the same date each month.
A border day is a date when the Sun entered the new sign during the day in at least one year from 1930 to 2025, in US Eastern or Pacific time. On those dates a birth in the morning and a birth at night can belong to different signs. Every other day of the year was the same sign in all 96 years, so the date alone gives the answer.
Every border date has its own page with the minute of the change for each year from 1930 to 2030: zodiac sign dates by year.
Zodiac signs in order from January to December
The calendar year starts in Capricorn, but the zodiac itself starts with Aries at the March equinox. Read month by month from January, the signs that begin in each month run: Aquarius (January), Pisces (February), Aries (March), Taurus (April), Gemini (May), Cancer (June), Leo (July), Virgo (August), Libra (September), Scorpio (October), Sagittarius (November) and Capricorn (December).
| Sign | Usual dates | Starts in |
|---|---|---|
| ♒︎ Aquarius | Jan 20 – Feb 18 | January |
| ♓︎ Pisces | Feb 19 – Mar 20 | February |
| ♈︎ Aries | Mar 21 – Apr 19 | March |
| ♉︎ Taurus | Apr 20 – May 20 | April |
| ♊︎ Gemini | May 21 – Jun 20 | May |
| ♋︎ Cancer | Jun 21 – Jul 22 | June |
| ♌︎ Leo | Jul 23 – Aug 22 | July |
| ♍︎ Virgo | Aug 23 – Sep 22 | August |
| ♎︎ Libra | Sep 23 – Oct 22 | September |
| ♏︎ Scorpio | Oct 23 – Nov 21 | October |
| ♐︎ Sagittarius | Nov 22 – Dec 21 | November |
| ♑︎ Capricorn | Dec 22 – Jan 19 | December |
The usual dates are the ones most horoscope sites print. Our month pages show where they hold every year and where they do not.
Birth months in US data
Our month pages also count US births from the Social Security Administration, 2000 to 2014. September had the most births per day (11,999) and January the fewest (10,909). The three months with the fewest births per day were January, April and March.
US births 2000 to 2014 from the Social Security Administration, as published by FiveThirtyEight. Births per day remove the effect of month length.
Questions about zodiac signs by month
What are the zodiac signs by month?
January: Capricorn, then Aquarius. February: Aquarius, then Pisces. March: Pisces, then Aries. April: Aries, then Taurus. May: Taurus, then Gemini. June: Gemini, then Cancer. July: Cancer, then Leo. August: Leo, then Virgo. September: Virgo, then Libra. October: Libra, then Scorpio. November: Scorpio, then Sagittarius. December: Sagittarius, then Capricorn.
Why does each month have two zodiac signs?
The signs follow the Sun, not the calendar. The Sun changes signs between the 18th and the 24th of each month, so every month holds the end of one sign and the start of the next.
Which months have three border days?
January, March, June, October and November. In each of them the Sun entered the new sign on three different dates over the years 1930 to 2025.
Do I need my birth time to know my zodiac sign?
Only if you were born on a border day. On the other days of the year the sign was the same in every year from 1930 to 2025, whatever the hour.
What is the rarest birth month?
In US births from 2000 to 2014, counted per day so that short months are not penalized, the three months with the fewest births were January, April and March. January averaged 10,909 births a day against 11,999 in September.
What zodiac sign starts the year?
On the calendar, Capricorn: January 1 is always Capricorn. In astrology the zodiac starts with Aries, the sign the Sun enters at the March equinox.
Sources
- Astronomy Engine: the open-source ephemeris library behind our planet positions, dates and statistics
- FiveThirtyEight: U.S. births data: daily US birth counts from the SSA (2000 to 2014) and CDC/NCHS (1994 to 2003)
- How we create our readings: our own calculation of sign dates, positions and the 1930 to 2025 statistics
All twelve signs with traits and compatibility: zodiac signs. Your exact sign for any date and time: zodiac sign calculator. Elements of the signs: fire, earth, air and water.
Written by The Zodiac Atlas editorial team with the help of AI and edited by a person. The day counts come from our own run of the astronomy-engine ephemeris (tropical zodiac) over 1930 to 2025, with historical US time zone rules. Astrology is a symbolic tradition, not a science.