Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

start_of_year() / end_of_year() — first/last business day of the year
start_of_week() / end_of_week() — first/last business day of the ISO week
is_month_end() / is_quarter_end() / is_year_end() — rebalancing triggers
All module-level imports moved to top of file (lazy-import pattern removed; no circular deps exist)
_WEST_EPOCH unified in _parse.py; _convert.py imports it directly
Ruff linting + formatting (pyproject.toml [tool.ruff])
Mypy type checking (pyproject.toml [tool.mypy])
Pre-commit hooks (.pre-commit-config.yaml)
GitHub Actions CI workflow (lint → format → test → coverage upload)
GitHub Actions docs workflow (MkDocs → GitHub Pages on push to master)
MkDocs documentation site with Material theme, feature grid, tabbed quick start, and GitHub Pages deployment
MIT LICENSE file
CONTRIBUTING.md
example.py — runnable walkthrough of all major API categories

Initial release
42 public methods across 13 categories
_parse.py — universal input detection (string, datetime, date, int/float, West serial)
_state.py — global calendar state (use(), verbose(), as_of())
_calendar.py — holiday data via exchange-calendars with LRU cache and custom overrides
_checks.py — is_weekend, is_holiday, is_business_day, is_expiry_day, day_of_week
_convert.py — to_timestamp, to_datetime, to_west, to_iso, convert, batch ops
_timezone.py — shift_tz, localize, strip_tz
_validate.py — is_valid, is_same_day, is_before, is_after
_navigate.py — next/prev_business_day, add_business_days, snap
_ranges.py — business_days_between, date_range, trading_days_in_month/year, filter_business_days
_periods.py — start/end_of_month, start/end_of_quarter
_settlement.py — to_settlement_date, to_cob, next_expiry, days_to_expiry
_io.py — load_calendar, save_calendar
447 tests across all modules