Explanation:

• Each year the International Day of Peace is observed around the world on 21 September.
• The International Day of Peace was established in 1981 by the United Nations General Assembly.
• Two decades later, in 2001, the General Assembly unanimously voted to designate the Day as a period of non-violence and cease-fire.
• The UN General Assembly has declared this as a day devoted to strengthening the ideals of peace, through observing 24 hours of non-violence and cease-fire.
• The United Nations invites all nations and people to honour a cessation of hostilities during the Day, and to otherwise commemorate the Day through education and public awareness on issues related to peace.
• The 2020 theme for the International Day of Peace is “Shaping Peace Together.”

Hence all statements are correct