The Battle of Blenheim is always given as July 2019 Blank Calendar. Confusion occurs when an event affects both. William III of England set sail from the Netherlands on July 2019 Blank Calendar (Gregorian calendar) and arrived at Brixham in England on July 2019 Blank Calendar (Julian calendar).
Shakespeare and Cervantes seemingly died on exactly the same date July 2019 Blank Calendar, but Cervantes predeceased Shakespeare by ten days in real time (as Spain used the Gregorian calendar, but Britain used the Julian calendar).