Occurify 

A comprehensive and intuitive .NET library for defining, filtering, transforming, and scheduling time periods.

Reactive Extensions for Occurify: Enabling seamless scheduling of instant and period-based timelines.

Time zone and cron expression support for Occurify: Filter, manipulate, and schedule instants and periods across time zones.

Astronomical instants and periods for Occurify: Track sun states, perform calculations, and manage events.