The 20th February every year is designated by the United Nations as the World Day of Social Justice, a day to recognise the ongoing importance of a principle that is central to all work towards 
global peace and prosperity. Below is an excerpt about the significance of this day, from the United Nations:
Social justice is an underlying principle for peaceful and prosperous coexistence within and among nations. We uphold the principles of social justice when we promote gender equality or the rights of indigenous peoples and migrants. We advance social justice when we remove barriers that people face because of gender, age, race, ethnicity, religion, culture or disability.
For the United Nations, the pursuit of social justice for all is at the core of our global mission to promote development and human dignity. The adoption by the International Labour Organization of the Declaration on Social Justice for a Fair Globalization is just one recent example of the UN system’s commitment to social justice. The Declaration focuses on guaranteeing fair outcomes for all through employment, social protection, social dialogue, and fundamental principles and rights at work.