Pet Zodiac Sign Calculator

Pick your pet's birth month and day — no year, no birth time, no sign-up. Born on a boundary day? We'll show you both candidate signs instead of quietly guessing.

No birthday? Enter the gotcha day instead — the day they came home works beautifully for this. Or skip dates entirely with the behavior-based quiz.

Every sign, both species Static reference

Jump to your pet's sign in the dog or cat guide. The one-line note under each sign summarizes the year-by-year boundary tables further down this page — the exact moment the sun crossed into each sign, 2010–2027, computed with the Swiss Ephemeris and cross-checked against NASA JPL DE421.

Boundary days, year by year 2010–2027 · Swiss Ephemeris ↔ JPL DE421

The printed date ranges are conventions; the sun crosses each boundary at a specific moment that drifts by about six hours a year and jumps back after every leap year. Only a pet born on a boundary day needs this — for everyone else the sign above is simply right. A few things the tables show: Leo began on July 22 (US Eastern) in seventeen of these eighteen years, Aries never once began on the printed March 21, and the Leo–Virgo handover split ten years to eight between August 22 and 23. Times were computed with the Swiss Ephemeris and cross-checked against NASA JPL DE421; the two agree within two seconds on all 216 crossings. All 216 are published as open data on the zodiac date reference, free to download and cite.

Why we only ask for month and day Input honesty

A sun sign is set by where the sun sits on the zodiac calendar — month and day decide it, so that's all we ask. We skip the name, the email, and the birth year because none of them change the answer. The one honest wrinkle: sign boundaries shift by about a day from year to year, which is why a birthday on the edge gets both candidates here instead of a silent coin-flip. (Deeper placements are different: the moon sign needs the full date, and the rising sign needs a birth time.)

Keep reading

The sign-by-sign references live in the dog zodiac guide and cat zodiac guide. Born on a boundary day? The year-by-year tables above settle it. Want the whole personality rather than just the sign? The free quiz reads behavior instead of dates.