Yasumi

Pure PHP implementation with a straightforward API, making it easy to integrate into any PHP project without external dependencies, as highlighted in the README.

Uses country and state providers to easily add new holidays, allowing for community-driven expansion and customization, as mentioned in the provider-based calculation feature.

Accounts for official establishment and abolition dates of holidays, ensuring correct calculations for past and present years, which is a key feature for reliability.

Supports global translations for holiday names, enabling localized information for international applications, as noted in the global translations highlight.