Recurrence pattern: every year on December 4.

National Dice Day is observed worldwide every December 4 to celebrate the gaming tool known as dice, which have a history spanning millennia. Dice, typically cubes marked with dots, serve as random number generators and are integral to various games, including board games, role-playing games like Dungeons & Dragons, and gambling games such as craps. The origins of dice are uncertain, but they have been used since ancient times in cultures such as Egypt, Greece, Rome, China, and Japan. On this day, people are encouraged to engage in activities like hosting game nights, starting D&D campaigns, or using dice for divination practices. Participants often share their experiences on social media using the hashtag #NationalDiceDay. This unofficial holiday highlights the cultural significance and enduring popularity of dice in gaming and beyond.