Ogham
Glossary · Last updated: 2026-07-26
Ogham is a medieval Irish script. Letters named after trees (Beith birch, Luis rowan, and others) were carved on stones and sticks.
Modern Celtic tree zodiac books borrow tree symbols from Ogham and calendars. Historical Celts did not use a sun-sign column like newspaper horoscopes.
Example: see it on a birth date
Ogham is an old Irish alphabet later tied to tree names. The Celtic tree for September 21, 2021 is the Vine moon.
The tree month is a modern calendar overlay. It is not the same as the Western sun sign Virgo.
Enter your own date on the Zodiac Sign Calculator.
Tree zodiac on this site
Our Celtic card follows a popular thirteen-tree wheel keyed to Gregorian dates. It is a cultural overlay for learning. It is not reconstructed Iron Age law.
Related
Main reading and tools
These are the main reading and calculator pages. Use them for a daily note, a birth-sign tool, or a pair check.
- Today's Horoscope hubAll twelve Western sun-sign daily pages, plus links to the seven-tradition reader.
- Horoscope & Zodiac CompatibilityTwo birth dates for Western, Chinese, and Indian Vedic pairing, plus every sun-sign hub.
- Zodiac Sign CalculatorWestern sun sign from birth date, with element, modality, and ruler.
- Rising Sign CalculatorIndian Vedic Lagna estimate when you have birth date, time, and place.
- Moon Sign CalculatorIndian Vedic Janma Rashi and nakshatra when birth time and city are available.