International Day of Peace: http://www.un.org/apps/news/story.asp?NewsID=54932&Cr=peace&Cr1=#.V9wUp4WcHZ8

71st UN General Assembly Opened in NYC  Sept.13,2016

General Debate dates are Sept 20- 26(30), 2016 

( as much as to Sept. 30th by regulations)

http://www.un.org/en/ga/

Click on the calendar day & list of meetings  will appear:

http://sd.iisd.org/events/71st-session-of-the-un-general-assembly-unga-71/

In sidebar : List of Meetings: scroll over meeting & details will appear http://sd.iisd.org/events/71st-session-of-the-un-general-assembly-unga-71/

Media info for meetings: UN Meetings coming up http://www.un.org/en/media/accreditation/events.shtml