International Tongue Twister Day is celebrated every second Sunday in November, with November 9 being the date in 2025. This day encourages participants to engage with tongue twisters, which are playful phrases that challenge pronunciation and articulation. Popular examples include "Peter Piper" and the woodchuck tongue twister. The day serves as a fun way to practice language skills, including foreign languages, and is often marked by individuals attempting to master difficult phrases. The origins of tongue twisters date back to the 19th century, when John Harris published "Peter Piper’s Practical Principles of Plain and Perfect Pronunciation." The celebration highlights the enjoyment and silliness of language, inviting people to explore the twisty challenges of spoken words.