Birthstone, birth flower and zodiac calculator
Enter a birthday to compare two birthstone lists, the Almanac’s birth flowers and a conventional zodiac sign. These are gift themes, with the source of each list shown below.
| Constant | Value | Source |
|---|---|---|
| Modern stones — Jewelers of America | All listed options for each month; June has pearl, moonstone and alexandrite, August has peridot and spinel, and December has turquoise, tanzanite and blue zircon. This is the JA list, not every country’s convention. | Jewelers of America — Birthstone Jewelry (September 14, 2026) |
| Traditional stones — International Gem Society | The IGS traditional list, including bloodstone in March, pearl in June, sardonyx in August and turquoise or lapis in December. “Lapis” is displayed as lapis lazuli. Other traditional lists differ. | International Gem Society — History of Birthstones, Traditional Birthstone List (September 14, 2026) |
| Birth flowers — The Old Farmer’s Almanac | Primary and secondary entries kept in the source order. March includes jonquil, a type of daffodil. November lists only chrysanthemum, so its second field says Not listed. Flower customs and local availability vary. | The Old Farmer’s Almanac — Birth Flowers by Month, February 2, 2026 (September 14, 2026) |
| Zodiac — fixed, approximate Western ranges | The twelve inclusive ranges in Wikipedia’s Western astrological correspondence table: Aries March 21–April 20 through Pisces February 20–March 20. Boundaries are approximate; this tool does not calculate a natal chart. | Wikipedia — Astrological sign, Western astrological correspondence chart (September 14, 2026) |
Enter a birthday to compare its modern and traditional birthstones, birth flowers and conventional zodiac sign. The results name the lists used, so you can explain a choice when giving a pendant, print or card. A birthday supplies a theme; her preferences decide whether that theme belongs in the gift.
The modern stones follow Jewelers of America. The traditional stones follow the International Gem Society, and the flowers follow The Old Farmer’s Almanac. The sign comes from Wikipedia’s approximate Western zodiac date table. These are separate conventions, checked on September 14, 2026. They are not a combined system that assigns someone a single correct gift.
What the birthday tells you
The tool returns seven fields: month, zodiac sign, sign dates, modern stones, traditional stones, primary flower and secondary flower. The stones and flowers depend only on the month. The sign depends on the month and day. Changing the year leaves these labels unchanged when both dates are valid.
Several months have multiple modern stones. June returns pearl, moonstone and alexandrite together; December returns turquoise, tanzanite and blue zircon. You can use any listed option as a starting point rather than treating the first name as a requirement. Our birthday gifts for a girlfriend guide can help turn that starting point into something that suits her routine.
November has one flower in the selected Almanac table. Its secondary field therefore reads “Not listed.” This means the source has no second entry, not that other flower traditions are wrong. March lists daffodil and jonquil; the Almanac explains that a jonquil is a type of daffodil, so those labels do not represent two unrelated flowers.
How the lookups work
Type the date as YYYY-MM-DD, including two digits for the month and day. The calculator accepts years 0001 through 9999 using Gregorian calendar rules. It checks the date before looking anything up: April 31 fails, and February 29 works only in a leap year. It does not calculate age or convert a historical date from another calendar.
Jewelers of America’s birthstone list supplies every option in the modern field. The International Gem Society’s traditional list supplies the adjacent field. Keeping the lists separate makes differences visible: August shows peridot and spinel against traditional sardonyx. These labels identify the source convention, not a ranking of gemstones.
The flower fields preserve the primary and secondary order in the Almanac’s birth flower table. They do not predict local flowering seasons or florist availability. A flower illustration can use the same theme without requiring a fresh stem.
The twelve ranges follow Wikipedia’s Western zodiac table. Both displayed end dates are included, and Capricorn spans December and January. These approximate ranges are fixed in this tool. It does not use birth time or location to calculate the Sun’s position on the birth date.
Three birthdays to compare
For 1996-07-24, the result is July and Leo, with dates July 24–August 23. Ruby appears in both stone fields. The Almanac flowers are larkspur and water lily, in that order. This birthday also checks the first day of Leo in the selected convention.
For 2000-02-29, the leap-day result is February and Pisces, with dates February 20–March 20. Both stone fields show amethyst; the flowers are violet and primrose. Entering 1900-02-29 instead produces a calendar error because 1900 was not a Gregorian leap year.
For 2001-12-30, the result is December and Capricorn, with dates December 22–January 20. Modern stones are turquoise, tanzanite and blue zircon; the traditional choices are turquoise or lapis lazuli. The flowers are narcissus and holly. The date range continues into January without changing the birthday’s December stones.
Before choosing a gift
An approximate zodiac calendar can disagree with a birth chart near a sign boundary. Check the sign she uses before personalizing an item. This lookup supplies no personality, compatibility or health assessment, and the flower associations do not establish a universal meaning for a bouquet.
The stone names also tell you nothing about a particular piece’s metal, treatments, authenticity or suitability for her. A month lookup cannot check allergies or guarantee that jewelry is comfortable. For the decision beyond the date, start with what she already likes in our thoughtful gifts guide.
Worked examples
- Born 1996-07-24 — July: Leo (July 24–August 23), ruby in both stone lists, larkspur and water lily.
- Born 2000-02-29 — A valid Gregorian leap day: Pisces (February 20–March 20), amethyst in both lists, violet and primrose.
- Born 2001-12-30 — December: Capricorn (December 22–January 20), three JA stones, turquoise or lapis lazuli in the IGS list, narcissus and holly.
Common questions
Why are there several birthstones for some months?
The modern field includes every choice in the Jewelers of America list. The traditional field follows the International Gem Society’s separate traditional list. Neither field says which stone a person must wear; use the named convention that matters to the recipient.
Is the zodiac result exact near a sign boundary?
No. It uses the fixed, approximate date ranges published in Wikipedia’s Western zodiac table. It does not use birth time or location to calculate a natal chart, and different date tables can disagree at the boundaries.
Why does November have no secondary flower?
The selected Almanac table lists chrysanthemum alone for November. Not listed refers to that table, rather than ruling out associations in other traditions.
Embed this calculator on your site
Constants and sources checked on September 14, 2026.