Cranky Co-Workers Day is celebrated on October 27 and is recognized in the United States. This quirky holiday encourages individuals to embrace the cranky attitudes of their co-workers, allowing for a day of light-hearted fun. Participants can choose to mimic crankiness themselves, donning frowns and complaining about minor issues, or simply let their grouchy colleagues express their moods without interference. The day promotes a break from routine, suggesting that everyone can join in on the fun by sending cranky emojis or agreeing with the complaints of the cranky co-worker. The holiday was introduced by Thomas and Ruth Roy through their company, Wellcat Holidays, which is known for creating various unique celebrations.