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24 October has been celebrated as United Nations Day since 1948. In 1971, the United Nations General Assembly recommended that the day be observed by Member States as a public holiday.

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World Day for International Justice, also referred to as Day of International Criminal Justice or International Justice Day, is an international day celebrated throughout the world on 17 July as part of an effort to recognize the emerging system of international criminal justice.

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World Standards Day (or International Standards Day) is an international day celebrated internationally each year on 14 October. The day honours the efforts of the thousands of experts who develop voluntary standards within standards development organizations such as the American Society of Mechanical Engineers (ASME), International Electrotechnical Commission (IEC), International Ethics Standards Board for Accountants (IESBA), International Organization for Standardization (ISO), International Telecommunication Union (ITU), Institute of Electrical and Electronics Engineers (IEEE) and Internet Engineering Task Force (IETF).