2018
Later action
Day of the Beginning of the Armed Struggle for National Liberation
Retained 4 February as the Day of the Beginning of the Armed Struggle for National Liberation within the later national-holiday framework.
Evergreen date guide
What is celebrated on September 28?
See the observances and verified observance-history milestones attached to September 28. 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.
2018
Later action
Dia da Independência Nacional
Amended the national-holiday law and retained November 11 as Dia da Independência.
2016
First observance
International Day for Universal Access to Information
UNESCO records the first International Day for Universal Access to Information as 28 September 2016.
2003
First observance
International Right to Know Day
An OSCE publication states that International Right to Know Day was first celebrated on 28 September 2003.
2002
Precursor
International Right to Know Day
The Sofia advocacy initiative preceded the first documented international celebration in 2003.
Curated global anchors
See the collection →Major global guides on September 28
A reviewed starting point drawn from prominent global observances with strong institutional or organizer sources. Each observance keeps its own documented status and scope.
Source-backedFixed AnnualIn-depth guide
International Day for Universal Access to Information
A/RES/74/5
Reviewed depth
Other in-depth guides on September 28
Source-backedFixed AnnualIn-depth guide
Czech Statehood Day
Current Czech law lists 28 September as Czech Statehood Day; the page’s St. Wenceslas wording is a search-facing alias for the statehood observance.
Source-backedRule Based AnnualIn-depth guide
Family Day — A Day to Eat Dinner With Your Children
University of Hawaiʻi material describes Family Day as an annual event launched in 2001, developed from research by the National Center on Addiction and Substance Abuse at Columbia Universi…
Source-backedFixed AnnualIn-depth guide
Fish Tank Floorshow Night
Wellcat Holidays lists Fish Tank Floorshow Night on September 28 and identifies Thomas and Ruth Roy as the holiday creators.
Source-backedFixed AnnualIn-depth guide
International Right to Know Day
The OSCE Mission to Serbia documented International Right to Know Day on 28 September in partnership with public institutions, UNDP, journalists and transparency groups.
Source-backedFixed AnnualIn-depth guide
National Good Neighbor Day
The current National Good Neighbor Day organizer uses September 28. Historical congressional materials contain date-specific and fourth-Sunday recognition formulations, so the record does n…
Source-backedFixed AnnualIn-depth guide
National North Carolina Day
National Day Calendar lists National North Carolina Day on 28 September. The U.S. Senate records North Carolina’s admission/statehood date as 21 November 1789. The two dates are deliberatel…
Explore the mix
All topics →Topics represented on September 28
7 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Czech Statehood Day
Current Czech law lists 28 September as Czech Statehood Day; the page’s St. Wenceslas wording is a search-facing alias for the statehood observance.
Source-backedRule Based AnnualIn-depth guide
Family Day — A Day to Eat Dinner With Your Children
University of Hawaiʻi material describes Family Day as an annual event launched in 2001, developed from research by the National Center on Addiction and Substance Abuse at Columbia Universi…
Source-backedFixed AnnualIn-depth guide
Fish Tank Floorshow Night
Wellcat Holidays lists Fish Tank Floorshow Night on September 28 and identifies Thomas and Ruth Roy as the holiday creators.
Source-backedFixed AnnualIn-depth guide
International Day for Universal Access to Information
A/RES/74/5
Source-backedFixed AnnualIn-depth guide
International Right to Know Day
The OSCE Mission to Serbia documented International Right to Know Day on 28 September in partnership with public institutions, UNDP, journalists and transparency groups.
Source-backedFixed AnnualIn-depth guide
National Good Neighbor Day
The current National Good Neighbor Day organizer uses September 28. Historical congressional materials contain date-specific and fourth-Sunday recognition formulations, so the record does n…
Source-backedFixed AnnualIn-depth guide
National North Carolina Day
National Day Calendar lists National North Carolina Day on 28 September. The U.S. Senate records North Carolina’s admission/statehood date as 21 November 1789. The two dates are deliberatel…
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 →