September
5 September
International Day of Charity (A/RES/67/105)
8 September
International Literacy Day (UNESCO 14 C/Resolution 1.441)
10 September
World Suicide Prevention Day [WHO]
12 September
United Nations Day for South-South Cooperation (A/RES/58/220)
15 September
International Day of Democracy (A/RES/62/7)
16 September
International Day for the Preservation of the Ozone Layer (A/RES/49/114)
21 September
International Day of Peace (A/RES/36/67) (A/RES/55/282)
23 September
International Day of Sign Languages (A/RES/72/161)
26 September
International Day for the Total Elimination of Nuclear Weapons (A/RES/68/32)
27 September
27 September (last Thursday of September)
World Maritime Day (IMCO/C XXXVIII/21)
28 September
International Day for Universal Access to Information [UNESCO] (38 C/70)
28 September
World Rabies Day [WHO]