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workclock is fast, correct business-time arithmetic (working hours, SLAs, shifts) for Rust, Python and JavaScript, and a maintained replacement for businesstimedelta, with a compatibility layer for existing code.

It answers two questions:

• How much working time lies between two datetimes?
• What datetime do you reach after adding or subtracting N working hours?

Status: pre-1.0; the API may still change in a minor release. Progress is tracked on the roadmap.

The repository is the source of truth: README, CONTRIBUTING and the ADRs. This wiki summarises and links to them.

• Getting Started
• Concepts
• Migrating from businesstimedelta
• Design and ADRs
• Benchmarks
• Release Process
• Contributing
• FAQ
• Design System