Year 1728 (MDCCXXVIII) was a leap year starting on Thursday (link will display the full calendar) of the Gregorian calendar (or a leap year starting on Monday of the 11-day slower Julian calendar). Events of 1728 January - June March 14 - Jean-Jacques Rousseau leaves Geneva for the first time. July - December October 20/23 - The Copenhagen Fire of 1728 burns (the largest fire in the history of the city). Undated Astronomical aberration is discovered by the astronomer James Bradley. The S… (More on 1728)