Public Holiday Data Sources
How we ingest, verify, and maintain official statutory public holiday schedules.
Accurate holiday data is the backbone of reliable vacation planning. Dayoffly combines automated API synchronization with curated multi-stage verification against primary government gazettes.
International open holiday API maintaining standardized ISO 3166-1 alpha-2 country mappings, regional subdivision codes, and statutory status classification across 100+ countries.
Curated primary sources including the US Office of Personnel Management (OPM), South Korea Ministry of Personnel Management, Japan Cabinet Office, and UK GOV.UK Bank Holidays service.
Primary Statutory DecreesFuture Holiday Notice
While public holiday laws for statutory holidays (such as New Year's Day, Christmas, and Independence Days) are permanent, astronomical and lunar-based dates (such as Lunar New Year, Eid, Diwali, or Easter) are periodically confirmed by regional authorities. Dayoffly marks future dates accordingly and runs scheduled periodic revalidation to reflect legislative changes.