List of International days of observances by UNO

S.No	day	International Day of Observence
1	27-Jan	International Day of Commemoration in Memory of the Victims of the Holocaust
2	04-Feb	World Cancer Day [WHO]
3	06-Feb	International Day of Zero Tolerance to Female Genital Mutilation [WHO]
4	13-Feb	World Radio Day [UNESCO]
5	20-Feb	World Day of Social Justice
6	21-Feb	International Mother Language Day [UNESCO]
7	01-Mar	Zero Discrimination Day [UNAIDS]
8	03-Mar	World Wildlife Day
9	08-Mar	International Women's Day
10	20-Mar	International Day of Happiness
11	21-Mar	International Day for the Elimination of Racial Discrimination
12	21-Mar	World Poetry Day [UNESCO]
13	21-Mar	International Day of Nowruz
14	21-Mar	World Down Syndrome Day
15	21-Mar	International Day of Forests and the Tree
16	22-Mar	World Water Day
17	23-Mar	World Meteorological Day [WMO]
18	24-Mar	World Tuberculosis Day [WHO]
19	24-Mar	International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims
20	25-Mar	International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade
21	25-Mar	International Day of Solidarity with Detained and Missing Staff Members
22	02-Apr	World Autism Awareness Day
23	04-Apr	International Day for Mine Awareness and Assistance in Mine Action
24	06-Apr	International Day of Sport for Development and Peace
25	07-Apr	Day of Remembrance of the Victims of the Rwanda Genocide
26	07-Apr	World Health Day [WHO]
27	12-Apr	International Day of Human Space Flight
28	22 -Apr	International Mother Earth Day
29	23 Apr	World Book and Copyright Day
30	23-Apr	English Language Day
31	25 Apr	World Malaria Day [WHO]
32	26-Apr	World Intellectual Property Day [WIPO]
33	28-Apr	World Day for Safety and Health at Work [ILO]
34	29-Apr	Day of Remembrance for all Victims of Chemical Warfare
35	30-Apr	International Jazz Day
36	03-May	World Press Freedom Day
37	8-9 May	Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War
38	11-12 May	World Migratory Bird Day [UNEP]
39	15-May	International Day of Families
40	17-May	World Telecommunication and Information Society Day [ITU]
41	21-May	World Day for Cultural Diversity for Dialogue and Development
42	22-May	International Day for Biological Diversity
43	23-May	International Day to End Obstetric Fistula
44	24-May	"Vesak", the Day of the Full Moon
45	29-May	International Day of UN Peacekeepers
46	31-May	World No-Tobacco Day [WHO]
47	01-Jun	Global Day of Parents
48	04-Jun	International Day of Innocent Children Victims of Aggression
49	05-Jun	World Environment Day [UNEP]
50	08-Jun	World Oceans Day
51	12-Jun	World Day Against Child Labour
52	14-Jun	World Blood Donor Day [WHO]
53	15-Jun	World Elder Abuse Awareness Day
54	17-Jun	World Day to Combat Desertification and Drought
55	20-Jun	World Refugee Day
56	23-Jun	United Nations Public Service Day
57	23-Jun	International Widows' Day
58	25-Jun	Day of the Seafarer [IMO]
59	26-Jun	International Day against Drug Abuse and Illicit Trafficking
60	26-Jun	United Nations International Day in Support of Victims of Torture
61	06-Jul	International Day of Cooperatives (first sat in july)
62	11-Jul	World Population Day
63	18-Jul	Nelson Mandela International Day
64	28-Jul	World Hepatitis Day [WHO]
65	30-Jul	International Day of Friendship
66	09-Aug	International Day of the World's Indigenous Peoples
67	12-Aug	International Youth Day
68	19-Aug	World Humanitarian Day
69	23-Aug	International Day for the Remembrance of the Slave Trade and Its Abolition [UNESCO]
70	29-Aug	International Day against Nuclear Tests
71	30-Aug	International Day of the Victims of Enforced Disappearances
72	05-Sep	International Day of Charity
73	08-Sep	International Literacy Day [UNESCO]
74	10-Sep	World Suicide Prevention Day [WHO]
75	12-Sep	United Nations Day for South-South Cooperation
76	15-Sep	International Day of Democracy
77	16-Sep	International Day for the Preservation of the Ozone Layer
78	21-Sep	International Day of Peace
79	26-Sep	World Maritime Day [IMO] lst week of sept
80	27-Sep	World Tourism Day [UNWTO]
81	28-Sep	World Rabies Day [WHO]
82	01-Oct	International Day of Older Persons
83	02-Oct	International Day of Non-Violence
84	05-Oct	World Teachers’ Day [UNESCO]
85	07-Oct	World Habitat Day first mond oct
86	09-Oct	World Post Day
87	10-Oct	World Mental Health Day [WHO]
88	10-Oct	World Sight Day [WHO] (second Thursday)
89	11-Oct	International Day of the Girl Child
90	13-Oct	International Day for Disaster Reduction
91	15-Oct	International Day of Rural Women
92	16-Oct	World Food Day [FAO]
93	17-Oct	International Day for the Eradication of Poverty
94	24-Oct	United Nations Day
95	24-Oct	World Development Information Day
96	27-Oct	World Day for Audiovisual Heritage [UNESCO]
97	02-Nov	International Day to End Impunity for Crimes against Journalists
98	06-Nov	International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
99	10-Nov	World Science Day for Peace and Development
100	12-Nov	World Pneumonia Day [WHO]
101	14-Nov	World Diabetes Day [WHO]
102	16-Nov	International Day for Tolerance
103	16-Nov	World Chronic Obstructive Pulmonary Disease Day [WHO]
104	17-Nov	World Day of Remembrance for Road Traffic Victims
105	19-Nov	World Toilet Day
106	20-Nov	Universal Children’s Day
107	21-Nov	World Philosophy Day (3rd Thursday in november)
108	21-Nov	World Television Day
109	22-Nov	Africa Industrialization Day
110	25-Nov	International Day for the Elimination of Violence against Women
111	29-Nov	International Day of Solidarity with the Palestinian People
112	01-Dec	World AIDS Day
113	02-Dec	International Day for the Abolition of Slavery
114	03-Dec	International Day of Persons with Disabilities
115	05-Dec	International Volunteer Day for Economic and Social Development
116	05-Dec	World Soil Day
117	07-Dec	International Civil Aviation Day [ICAO]
118	09-Dec	International Anti-Corruption Day
119	10-Dec	Human Rights Day
120	11-Dec	International Mountain Day
121	18-Dec	International Migrants Day
122	20-Dec	International Human Solidarity Day