Dictionary Day is observed in the United States every October 16 to commemorate the birthday of Noah Webster, a significant figure in American lexicography. The holiday encourages people to open a dictionary and learn new words, celebrating the contributions of Webster, who published influential dictionaries that shaped American English. Notably, his first dictionary, A Compendious Dictionary of the English Language, was published in 1806, followed by An American Dictionary of the English Language in 1828, which included 70,000 entries. Although not a nationally recognized holiday, participants often engage in activities such as playing word-based games, signing up for "word of the day" newsletters, and sharing their experiences on social media with hashtags like #DictionaryDay and #NationalDictionaryDay. The day serves to highlight the importance of language and the role of dictionaries in education and communication.