Western zodiac
These pages explain the tropical Western sign ranges used by the birthday calculator. Treat them as cultural classifications: fun context, not science reports.
Looking for jewelry months instead? See birthstones. Prefer the Chinese animal cycle? Visit Chinese zodiac.
Common questions
What is the Western zodiac on this site?
A tropical (season-based) map of twelve signs with fixed date ranges. It is a cultural astrology system, not an astronomy catalog of today’s constellations.
Why do some people say NASA changed the signs?
They did not. Astronomy explainers periodically show that constellation dates and tropical sign dates do not match. That geometry is old news, not a personality update.
Are birthstones the same as zodiac gems?
No. Birthstones follow calendar months. Western signs follow tropical date ranges that often cross months.
