UN (United Nations) Day is an annual event held in October on the Thursday nearest to United Nations Day. Many people consider this to be 'the best' day of the year at Narrabundah - it is certainly the most colorful!

The college celebrates UN Day with an International Food Fair and entertainment in the College quadrangle. Entertainment is led by the LOTE and Music department and all faculties organise the Food Fair. A display of flags from countries who are members of the United Nations is a feature of UN Day.

Students of Narrabundah College come from many different nations and this is a chance to enjoy their cultural diversity. United Nations Day is seen as an excellent way to remind students of the ideas of peace and harmony that the United Nations has striven to foster.

Profits from this day are always used to support educational projects for needy overseas students.

UN day held on 21st of October 2008.