Majalisar Dinkin Duniya a hukumance ta wanzu a ranar 24 ga oktoban 1945. A cikin 1947, Babban zauren Majalisar Dinkin Duniya ya ayyana ranar 24 ga Oktoba, ranar tunawa da Yarjejeniyar Majalisar Dinkin Duniya, wacce za a “gabatar da ita ga mutanen duniya manufofin Majalisar Dinkin Duniya da nasarorinta da kuma samun goyon bayansu. domin" aikinta. A cikin 1971, Babban zauren Majalisar Dinkin Duniya ya sake zartar da wani kuduri (Kudurin Majalisar Dinkin Duniya 2782) wanda ke bayyana cewa ranar Majalisar Dinkin Duniya za ta zama hutun kasa da kasa ko hutun kasa da kasa kuma ya ba da shawarar cewa ya kamata a kiyaye shi a matsayin ranar hutu ta kasashe mambobin Majalisar Dinkin Duniya. Taron farko da aka kira "Ranar Majalisar Dinkin Duniya" rana ce ta hadin kai da kuma faretin soja da Shugaban Amurka Franklin D. Roosevelt ya gabatar wanda ya danganta da Ranar Tutar Amurka a ranar 14 ga Yuni, 1942, watanni shida bayan sanarwar Majalisar Dinkin Duniya. An lura da shi a cikin New York City a matsayin faretin "New York at War", a London, da gwamnatocin Soviet da China.