# Changelog

## [1.0.0] - 2026-03-08

### Added

- `getSpa()` computes solar position for any date and location
- Custom zenith angle support for twilight calculations
- Full NREL SPA algorithm (Reda & Andreas, 2004)
- Accuracy: ±0.0003° for solar zenith angle
- Valid range: years -2000 to 6000
- Zero external dependencies