National Schwa Day is celebrated on April 7th, a date chosen because both "April" and "seven" contain the schwa sound. Founded by Yvette Manns, the day aims to highlight the schwa, the most commonly used sound in the English language, represented by the upside-down letter "e" [ə]. This reduced vowel sound occurs in unstressed syllables, such as the 'a' in "around" and the 'o' in "mother." Observers of National Schwa Day often engage in activities that promote awareness and understanding of this sound, including reading Manns' book, "The Not-So-Lazy Schwa," which is aimed at children but enjoyable for all ages. Teachers and parents are encouraged to create lessons focusing on the schwa sound, helping students practice its pronunciation and writing. The day serves as an opportunity for both native and non-native English speakers to appreciate this important aspect of language.