2018
Later action
World Breastfeeding Week
Welcomed the annual celebration of World Breastfeeding Week as an opportunity to communicate the importance of breastfeeding and advocate for its protection, promotion and support.
Evergreen date guide
What is celebrated on May 26?
See the observances and verified observance-history milestones attached to May 26. 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.
2015
Institutional decision
World AMR Awareness Week
WHA68.7 is dated 26 May 2015 and the official record states that it was adopted at the ninth plenary meeting that day.
2012
Institutional decision
World Immunization Week
WHA65.18 is dated 26 May 2012 and records adoption at the tenth plenary meeting.
1998
First observance
National Sorry Day
AIATSIS, Reconciliation Australia and Human Rights Commission sources identify May 26, 1998 as the first National Sorry Day.
1997
Institutional decision
National Sorry Day
The date rationale and recommendation are tied to the tabling of the Bringing Them Home report on May 26, 1997.
1966
First observance
Guyana Independence Day
Parliament records independence taking effect and the first sitting of the first Parliament on May 26, 1966; the national anniversary is anchored to that date.
1908
Institutional decision
Rhode Island Independence Day
The 2026 Rhode Island Senate resolution gives May 26, 1908 as the date the General Assembly passed Public Laws section/chapter 1591.
Reviewed depth
Other in-depth guides on May 26
Source-backedFixed AnnualIn-depth guide
Guyana Independence Day
Parliament of Guyana documents the 26 May 1966 constitutional independence date; current Government of Guyana material confirms continuing May 26 anniversary observance.
Source-backedFixed AnnualIn-depth guide
Independence Day
Georgia’s National Archives verifies adoption of the Act of Independence on 26 May 1918, and current Georgian labour law lists 26 May as Independence Day.
Source-backedFixed AnnualIn-depth guide
National Blueberry Cheesecake Day
The U.S. Highbush Blueberry Council repeatedly identifies May 26 as National Blueberry Cheesecake Day in its industry marketing materials.
Source-backedFixed AnnualIn-depth guide
National Sorry Day
Australian Human Rights Commission, AIATSIS, Reconciliation Australia and current PM&C material verify May 26, the first National Sorry Day on 26 May 1998 and the date’s connection to the 1…
Explore the mix
All topics →Topics represented on May 26
4 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Guyana Independence Day
Parliament of Guyana documents the 26 May 1966 constitutional independence date; current Government of Guyana material confirms continuing May 26 anniversary observance.
Source-backedFixed AnnualIn-depth guide
Independence Day
Georgia’s National Archives verifies adoption of the Act of Independence on 26 May 1918, and current Georgian labour law lists 26 May as Independence Day.
Source-backedFixed AnnualIn-depth guide
National Blueberry Cheesecake Day
The U.S. Highbush Blueberry Council repeatedly identifies May 26 as National Blueberry Cheesecake Day in its industry marketing materials.
Source-backedFixed AnnualIn-depth guide
National Sorry Day
Australian Human Rights Commission, AIATSIS, Reconciliation Australia and current PM&C material verify May 26, the first National Sorry Day on 26 May 1998 and the date’s connection to the 1…
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 →