The United Nations has declared August 19th to be World Humanitarian Day:
World Humanitarian Day is a time to recognize those who face danger and adversity in order to help others. The day was designated by the General Assembly to coincide with the anniversary of the 2003 bombing of the United Nations headquarters in Baghdad, Iraq.
World Humanitarian Day is also an opportunity to celebrate the spirit that inspires humanitarian work around the globe
You might be interested in The Best Resources For World Humanitarian Day.