Philipp A. Maas assessed Patañjali's Pātañjalayogaśāstra's date to be about 400 CE, based on synchronisms between its arguments and those of Vasubandhu, on tracing the history of the commentaries on it published in the first millennium CE, on the opinions of earlier Sanskrit commentators, on the testimony of manuscript colophons and on a review of extant literature. This dating for the Pātañjalayogaśāstra was proposed as early as 1914 by Woods and has been accepted widely by academic scholars of the history of Indian philosophical thought.
