March 4th, 2023
Grammar is defined as the whole system of language. It involves the correct usage of vocabulary, syntax, punctuation, and more. Designated in 2008, National Grammar Day was established by Martha Brockenbrough, author of "Things That Make Us [Sic]" and founder of the Society for the Promotion of Good Grammar.
Source: www.grammarly.com/blog/a-brief-history-of-national-grammar-day/