Short answers, pulled from the story.
The first systematic grammar of Sanskrit emerged in Iron Age India during the 6th century BC, crafted by scholars like Yaska and the legendary Pānini. Pānini codified the language's structure with such precision that his work remains a cornerstone of linguistic history.
Dionysius Thrax wrote the Art of Grammar, the oldest known grammar handbook, which served as the primary textbook for Greek schoolboys until the 12th century AD. Dionysius Thrax was a student of Aristarchus of Samothrace and formalized grammar as a distinct field of study from the 3rd century BC onward.
Antonio de Nebrija published the first Spanish grammar, Gramática de la lengua castellana, in 1492. This work appeared during the Renaissance and Baroque periods when efforts to codify vernacular languages gained significant influence.
Modern comparative linguistics began in 1833 when Franz Bopp released the Comparative Grammar. This publication marked the starting point of the field, following Jacob Grimm's Deutsche Grammatik in the 1810s.
The Society for the Promotion of Good Grammar designated the 4th of March as National Grammar Day in 2008. This designation aims to highlight the importance of understanding grammar despite the challenges faced by second-language learners.