The UN Calendar of Observances app says this about the day:
More than eight million Palestinian people live in territory occupied by Israel, in Israel, in neighbouring Arab States, and in regional refugee camps. International Day of Solidarity provides an opportunity to remind the international community that the question of Palestine remains unresolved and that the Palestinian people have not yet attained their inalienable rights as defined by the UN General Assembly, including the right to self-determination and national independence.
On the official page for the day, the UN provides this description:
In 1977, the General Assembly called for the annual observance of 29 November as the International Day of Solidarity with the Palestinian People (resolution 32/40 B ). On that day, in 1947, the Assembly adopted the resolution on the partition of Palestine(resolution 181 (II))
In resolution 60/37 of 1 December 2005, the Assembly requested the Committee on the Exercise of the Inalienable Rights of the Palestinian People and the Division for Palestinian Rights, as part of the observance of the International Day of Solidarity with the Palestinian People on 29 November, to continue to organize an annual exhibit on Palestinian rights or a cultural event in cooperation with the Permanent Observer Mission of Palestine to the UN.
The observance of the International Day of Solidarity with the Palestinian People also encouraged Member States to continue to give the widest support and publicity to the observance of the Day of Solidarity.
In 2014, the Day, which is normally observed on 29 November, will be commemorated at UN Headquarters in New York on Monday, 24 November.
I had the privilege to speak on behalf of the Israel-Palestine NGO Working Group at the UN for the observance of the International Day of Solidarity with the Palestinian People. We called for the UN and international community to increase their engagement and efforts to support Palestinians and Israelis in the search for just, sustainable peace.
UN Secretary-General Ban Ki-moon also spoke. He concluded:
On this International Day of Solidarity, I call on the parties to step back from the brink. The mindless cycle of destruction must end. The virtuous circle of peace must begin.
May the circle begin!
See you along the Trail.