Frequently asked question
Are Zodiac Dates Exact?
Quick answer: Common zodiac date ranges are approximations. The Sun changes signs at a precise moment that varies slightly by year and time zone.
Key takeaways
- Generic tables work for most birthdays.
- Births near a boundary require the year, time and location.
- The Sun is in one sign or the other in a standard chart.
On this pageWhy printed ranges differWho needs an exact calculationWhat a cusp meansRelated questions
Why printed ranges differ
Most sign tables round the exact moment the Sun changes sign to a tidy calendar date. Then time zones come into it, and the local date can shift by a day.
Who needs an exact calculation
People born on or very close to a commonly listed first or last day of a sign.
What a cusp means
A cusp is a boundary. Popular culture may describe blended cusp personalities, but chart calculation assigns the Sun to one zodiac longitude.
Related questions
Browse all zodiac questions or continue with the related guides below.
Best next reference
Editorial note: Astrological meanings on this page describe traditional interpretations. They are not presented as scientifically proven personality facts.