And You Shall Sanctify the Fiftieth Year

וקדשתם את שנת החמשים שנה וקראתם דרור בארץ לכל-ישביה

Perhaps one can say that to sanctify the Yovel year means to make it in to its own year and not overlapping with the first year of the following cycle.  And since that is not done now, on this Yovel year of 5776, the 50th year overlaps the first year, which was counted in Beit Din on Tzom Gedaliah.

Shana tova