Yes, if you ever play outside your own living room. The card is not a summary of the rules, it is the list of hands that are legal to win with this year, and the National Mah Jongg League rewrites it every spring. Last year's card is not a slightly outdated version of the game. At a club or tournament table it is simply not valid.
Why the card has to change
Most card games have one rulebook that slowly gets an errata sheet. American mah jongg does not work that way. There is no generic winning shape you can fall back on — no "four sets and a pair," no minimum score you can argue your way past. A hand wins only if it matches one printed line on the current card exactly: the tile identities, the group sizes, which suits must match or differ, and whether the hand may be exposed. Miss by one tile and it is not a lesser win. It is a dead hand.
So the card is not optional reading. It is the definition of winning. And because that definition is reissued every year, the physical piece of paper in your bag has an expiry date.
What actually happens every spring
Here is what stays put and what moves.
What does not change: the 152 tiles, the fact that you can only pung and kong because there are no chows, and the joker rules — jokers fill groups of three or more, never a pair, never a single, and they can never pass in the Charleston. Those are stable year to year. (Details in the joker rules.)
What changes: the hands themselves. The category structure is stable, but the individual lines inside it are new, and the section built around the current year's digits is rebuilt from scratch. That yearly rewrite is the point of the exercise — it is why the game never settles into a fixed set of solved patterns.
Practically, that means buying a new card does not mean relearning mah jongg. It means learning this year's lines. A player who read last year's card comfortably will navigate the new one inside a session or two.
What it costs, and when to order
The standard card is about $14, with a large-print version around $15, and proceeds go to charitable causes designated by the League. Order in March: cards are typically mailed late March to early April, and everyone receives theirs in the same window. Set against a set that costs a few hundred dollars and lasts for decades, it is the cheapest thing you will buy all year.
At the table: the costly version of the mistake
Picture a Tuesday club table in April. Three players have the current card. One is still playing last year's, and is holding a hand that scored nicely under the old card — a clean group of matching tiles across two suits, plus a pung, the kind of shape that used to be worth a respectable number.
She calls Mah Jongg.
Nobody disputes her tile layout. Someone just asks which line it matches, and reads the current card aloud: that exact combination is not on it this year. It is not a smaller win. It is a dead hand, and the game continues without her. Worse, two other players had already committed to the sections she thought she was contesting, so her discards have been feeding hands that are now unstoppable.
That player was not careless. She was one edition behind, and that is enough.
Three mistakes that catch almost everyone
Assuming an old card works in January and February. It does, and that is the confusing part. Cards are mailed in late March to early April, so for the first months of the year everyone is still on last year's edition. Then April arrives and the table quietly switches. If you only play in January, you can go years without noticing there is a cycle.
Sharing one card around the table. The standard card is about $14 and the large-print version about $15. Split four ways that is under four dollars a player, and every player should have their own. Passing a single card slows every decision and turns every close call into an argument about who was still holding it.
Forgetting to check which card the table plays. Two organizations publish annual American cards, the National Mah Jongg League and the American Mah-Jongg Association. The hands are different and the two are not interchangeable. Before you sit down with strangers, ask which one they play — see the FAQ for the short version.
Before you sit down
Check three things: the year printed on your card matches the calendar year, the card is the one your table uses, and it is yours rather than the table's single copy. If the first one fails, the fix costs less than lunch.
One line to remember
New year, new card — the tiles never change, but the hands you are allowed to win with always do.