How it’s worked out
55 − (2 × 12 + 31) = 0, which is the Joker.
See the step-by-step guide to the formula.
The Joker at a glance
Strengths
- Adaptable and able to play many roles
- Playful, creative and good humoured
- Comfortable in very different situations
Challenges
- Feeling unsure who they really are
- Showing different sides to different people
- Finding it hard to settle on one path
Read the full Joker meaning, including love, work, life lessons and reflection questions.
Your Cardology year if you were born on 31 December
Your Cardology year starts every 31 December. It’s split into seven periods of 52 days, each with its own theme:
| Period and theme | Dates |
|---|---|
| MercuryCommunication, learning and short trips. Things tend to move quickly. | 31 Dec to 20 Feb |
| VenusRelationships, friends, family, home and enjoyment. | 21 Feb to 13 Apr |
| MarsEnergy, drive, competition and conflict. | 14 Apr to 4 Jun |
| JupiterGrowth, money, work opportunities and generosity. Seen as the most positive period. | 5 Jun to 26 Jul |
| SaturnResponsibility, hard work, health and limits. Seen as the most challenging period. | 27 Jul to 16 Sep |
| UranusChange, surprises, independence and gut feelings. | 17 Sep to 7 Nov |
| NeptuneDreams, imagination, travel, rest and wrapping up the year before your birthday. | 8 Nov to 30 Dec |
Dates are for years without 29 February. If 29 February falls inside your year, periods after it start one day earlier.
Each year of your life also has a planet of its own, based on your age. Divide your age by 7: a remainder of 0 is a Mercury year, 1 Venus, 2 Mars, 3 Jupiter, 4 Saturn, 5 Uranus and 6 Neptune. Read about planet years.
The only birthday with this card
31 December is the only birthday that gives the Joker.
See your own Cardology year. Enter your birthday to find your card, your planet year and the seven 52-day periods of your year, with a printable PDF.
Find your birth card