15 September 2026

International Day of Democracy - Popular in:
Cantabria Day (Día de Cantabria) - Spain
Costa Rica Independence Day - Popular in: United States
El Salvador Independence Day - Popular in: United States
Guatemala Independence Day - Popular in: United States
Honduras Independence Day - Popular in: United States
Nicaragua Independence Day - Popular in: United States
Independence Day (Día de la Independencia) - Popular in: Costa Rica
Day of Our Lady of Sorrows (Deň Panny Márie Bolestnej) - Slovakia
Prince's Day / The Opening of Dutch Parliament (Prinsjesdag) - Netherlands
Day of Restoration of the Primorska Region to the Motherland (Dan Obnove Primorske na Domovino) - Slovenia
Battle of Britain Day - United Kingdom
Dia do Cliente - Brazil
Engineers Day - India