Bartholomew tide : Time of the festival of St. Bartholomew, August 24th.

Example:


Taxonomy
Bartholomew Fair, the Priory, free encyclopedia, Cloth Fair, parish, summer fairs, St Bartholomew, the City of London, search, Ben Jonson, pre-eminent, charter, precincts, two-week event, pleasure fair, crowds, classes, English society.

Defination from the web:
Bartholomew-the-Great. ... It was customary for the Lord Mayor of London to open the fair on St Bartholomew's Eve. ...