The birthday reference
Planetary Ruling Card Chart
Your birth card is one part of the reading. Your planetary ruling card, or PRC, adds another layer. Find your birthday below to see both, including every ruling card when your date has more than one.
By Cassidy Rice · Updated September 17, 2026 · Editorial policy
366 birthdays · complete results · free
Find your planetary ruling card by birthday
Open your birth month. Read across from your birthday to your birth card and ruling card(s). Each card name opens its meaning. The chart includes February 29 and the December 31 Joker exception.
January31 birthdays
February29 birthdays
March31 birthdays
April30 birthdays
May31 birthdays
June30 birthdays
July31 birthdays
August31 birthdays
September30 birthdays
October31 birthdays
November30 birthdays
December31 birthdays
Reference: the Card Blueprints birthday table, shared with our calculator. Reviewed September 17, 2026. Month and day are enough for this lookup.
Check the method
How the ruling-card lookup works
In the Cardology tradition, ruling cards connect a birthday with planetary rulership. On this site, the actual lookup is straightforward: your month and day select a saved entry. That entry may contain one, two, or three cards. We display the full entry.
- Find the birthday. January 15 selects the entry for month 1, day 15.
- Read both fields. The birth card is the Queen of Diamonds. The ruling-card entry is the 7 of Clubs.
- Check the result. Find January 15 in the chart or CSV, then enter that birthday in the calculator. All three use the same lookup.
The birth-card formula calculates the birth card. It does not, by itself, calculate the ruling card. This chart does not recalculate zodiac boundaries from your birth year, time, or location.
The lookup tells you which cards the site assigns. Their personality meanings are Cardology interpretations, not evidence that a card causes your behavior. The methodology page explains that distinction.
Read across the chart
Same birth card, different ruling card
January 15 and February 13 share the Queen of Diamonds birth card. Their ruling cards differ. That is why a ruling-card lookup needs the birthday, even when you already know your birth card.
August 20 shows another possibility: the birth and ruling cards match. October 23 shows a three-card result. Neither is a reason to discard part of the lookup. For the meaning of each role, read birth card vs ruling card.
Two ruling cards, three cards, and special birthdays
Our table contains 45 birthdays with two ruling cards and two with three. October 23 and October 24 are the three-card dates. We preserve all of them in the chart and download.
Multiple results do not automatically mean a zodiac cusp. November 6, for example, returns the 3 of Clubs and Queen of Spades. Use the complete date entry rather than assuming a rule from a sign boundary.
- February 29
- The birth card is the 9 of Clubs; the ruling card is the 2 of Diamonds. Leap day has its own row.
- December 31
- The site uses Joker in both fields for this exception. It is outside the ordinary 52-card set. Read the Joker explanation for that distinction.
Planetary ruling card calculator
Prefer to enter a birthday? This free calculator shows your birth card and complete ruling-card result. It asks for a full date because it also includes your current timing. No signup or email.
Planetary ruling card FAQ
What is a planetary ruling card?
A planetary ruling card, or PRC, is a playing card read alongside your birth card in Cardology. The birth card describes the main pattern; the ruling card adds another way to read its expression. Card Blueprints looks up the complete ruling-card result from your month and day.
How do I find my planetary ruling card?
Find your month and day in the chart on this page. The middle column shows your birth card and the last column shows every ruling card assigned to that birthday. You can also use the free calculator below the chart. No account or email is needed.
Can you have two ruling cards?
Yes, and some dates have three. The Card Blueprints table has 45 birthdays with two ruling cards and two birthdays with three: October 23 and October 24. These are entries in our date table, not a claim that every multiple-card birthday is a zodiac cusp.
Can my birth card and planetary ruling card be the same?
Yes. For example, August 20 has the 6 of Clubs as both its birth card and ruling card in this table. They describe two roles in the reading even when the card matches.
Do I need my birth year, birth time, or birthplace?
Not for this chart. Both the birth-card and ruling-card lookups on Card Blueprints use month and day. The calculator asks for a full date because it also shows age-based timing. It does not use your birth time or birthplace to choose a ruling card.
What are the ruling cards for February 29 and December 31?
February 29 has the 9 of Clubs birth card and the 2 of Diamonds ruling card. December 31 is the Joker exception: our table returns Joker in both fields. Joker is not one of the ordinary 52 cards, so read its separate explanation.
Is a planetary ruling card the same as a ruling planet?
No. A ruling planet is an astrology label such as Venus or Saturn. A planetary ruling card is a playing card. In Cardology, planetary rulership is part of the tradition behind the card assignment; this tool uses the site's saved birthday table rather than calculating an astrological chart.
Why might another ruling-card chart give a different answer?
Compare the method and the full list of cards. This chart publishes the same date table used by the Card Blueprints calculator, including multiple-card dates and the Joker exception. It is a reference for this site's convention, not a claim that every Cardology source uses identical rules. The CSV lets you check each result.