December

December is the twelfth and final month of the year. It is the first month of winter in the Northern Hemisphere, where snow sticks on the ground after December 10 (or December 9 in ), making it possible to create snowboys from snowballs on the ground. It is also the first month of summer in the Southern Hemisphere, and is where it is possible to find and catch a shark. The December Solstice occurs during this month, where it is the shortest day in the Northern Hemisphere and the longest day in the Southern Hemisphere.

Toy Day is celebrated throughout this month as a stand-in for Christmas (this holiday is not in ). Jingle makes a prominent role as the host of Toy Day.

Fish

 * Fish/Doubutsu no Mori/December
 * Fish/Animal Crossing/December
 * Fish/Doubutsu no Mori e+/December
 * Fish/Wild World/December
 * Fish/City Folk/December
 * Fish/New Leaf/December
 * Fish/New Horizons/December

Bugs

 * Bugs/Doubutsu no Mori/December
 * Bugs/Animal Crossing/December
 * Bugs/Doubutsu no Mori e+/December
 * Bugs/Wild World/December
 * Bugs/City Folk/December
 * Bugs/New Leaf/December
 * Bugs/New Horizons/December

Sea creatures

 * Sea creatures/New Leaf/December
 * Sea creatures/New Horizons/December

Names in other languages
Asian languages uses numbers instead of month's name.