2021
Institutional decision
World Cotton Day
The UN Digital Library records adoption without a vote at the 99th plenary meeting on 30 August 2021.
Evergreen date guide
What is celebrated on August 30?
See the observances and verified observance-history milestones attached to August 30. Each observance keeps its own source and date details.
Verified history
Today in history →On this date in observance history
Selected observance milestones connected to this date, based on reviewed sources.
2021
Institutional decision
World Wetlands Day
Exact action/adoption date of the establishing instrument in the reviewed institutional/legal source.
2016
Institutional decision
National Diatomaceous Earth Day
The creator launch article is dated August 30, 2016.
2011
First observance
International Day of the Victims of Enforced Disappearances
A/RES/65/209 declares 30 August the International Day to be observed beginning in 2011.
Reviewed depth
Other in-depth guides on August 30
Source-backedFixed AnnualIn-depth guide
August 30 Victory Day
Republic of Türkiye government material identifies August 30 Victory Day with the decisive 1922 victory and continuing annual commemoration. Current national-holiday law, Law No. 2429, list…
Source-backedFixed AnnualIn-depth guide
International Day of the Victims of Enforced Disappearances
A/RES/65/209
Source-backedFixed AnnualIn-depth guide
International Whale Shark Day
Wildlife Trust of India’s 2026 observance page states that International Whale Shark Day is marked every year on 30 August and documents its own continuing participation.
Source-backedFixed AnnualIn-depth guide
National Grief Awareness Day
Local-government proclamations consistently recognize August 30 and identify Angie Cartwright as the 2014 founder; no federal legal-holiday status or exclusive current national facilitator…
Source-backedFixed AnnualIn-depth guide
Popular Consultation Day
Timor-Leste Law No. 10/2005 designates August 30 as Popular Consultation Day, a fixed-date national public holiday; current Government holiday notices retain that status, and UN records est…
Source-backedRule Based AnnualIn-depth guide
Social Justice Sunday
The Australian Catholic Bishops’ social-justice office verifies the current last-Sunday-in-August rule, the former last-Sunday-in-September schedule and the change from 2020.
Explore the mix
All topics →Topics represented on August 30
6 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
August 30 Victory Day
Republic of Türkiye government material identifies August 30 Victory Day with the decisive 1922 victory and continuing annual commemoration. Current national-holiday law, Law No. 2429, list…
Source-backedFixed AnnualIn-depth guide
International Day of the Victims of Enforced Disappearances
A/RES/65/209
Source-backedFixed AnnualIn-depth guide
International Whale Shark Day
Wildlife Trust of India’s 2026 observance page states that International Whale Shark Day is marked every year on 30 August and documents its own continuing participation.
Source-backedFixed AnnualIn-depth guide
National Grief Awareness Day
Local-government proclamations consistently recognize August 30 and identify Angie Cartwright as the 2014 founder; no federal legal-holiday status or exclusive current national facilitator…
Source-backedFixed AnnualIn-depth guide
Popular Consultation Day
Timor-Leste Law No. 10/2005 designates August 30 as Popular Consultation Day, a fixed-date national public holiday; current Government holiday notices retain that status, and UN records est…
Source-backedRule Based AnnualIn-depth guide
Social Justice Sunday
The Australian Catholic Bishops’ social-justice office verifies the current last-Sunday-in-August rule, the former last-Sunday-in-September schedule and the change from 2020.
How dates are selected
This page combines fixed annual dates, reusable calendar rules and year-specific dates confirmed for 2026. Variable or historical dates are included only when they are clearly supported.
Read the methodology →