cn_stock_holidays

A comprehensive Python package providing China stock exchange holiday data for both Shanghai/Shenzhen (SHSZ) and Hong Kong (HKEX) markets. This package serves as a reliable data source and utility library for financial applications that need to determine trading days.

Features

• Dual Market Support: Covers both mainland China and Hong Kong markets
• Multiple Data Sources: Local files, cached data, and remote fetching
• Zipline Integration: Provides exchange calendars for algorithmic trading
• CLI Tools: Command-line utilities for data extraction
• Caching Mechanism: LRU cache for performance optimization
• Comprehensive API: Functions for trading day calculations

Data Files

Shanghai/Shenzhen Market

cn_stock_holidays/data.txt

Hong Kong Market

cn_stock_holidays/data_hk.txt

Fetch Data via URL

# Shanghai/Shenzhen data
wget https://raw.githubusercontent.com/rainx/cn_stock_holidays/main/cn_stock_holidays/data.txt

# Or using curl
curl https://raw.githubusercontent.com/rainx/cn_stock_holidays/main/cn_stock_holidays/data.txt

Data Format

Shanghai/Shenzhen Market

The data files store all holidays for China stock exchanges (excluding regular weekend closures on Saturday and Sunday), with one date per line in the format:

YYYYMMDD

Hong Kong Market

Hong Kong market data supports both regular holidays and half-day trading days. The format is:

YYYYMMDD    # Regular holiday
YYYYMMDD,h  # Half-day trading day

Half-day trading days are days when the market is open for only part of the day (typically morning session only). Common half-day trading days in Hong Kong include:

• Christmas Eve (December 24)
• New Year's Eve (December 31)
• Lunar New Year's Eve
• Day before major holidays (Qingming Festival, National Day)

Important: Half-day trading days are still considered trading days by all standard functions (is_trading_day(), next_trading_day(), etc.). Use is_half_day_trading_day() to specifically detect half-day trading days.

Installation

Using uv (Recommended)

This project supports uv, a fast Python package installer:

# Install uv first
curl -LsSf https://astral.sh/uv/install.sh | sh

# Install the package
uv pip install cn-stock-holidays

Using pip

pip install cn-stock-holidays

From source

git clone https://github.com/rainx/cn_stock_holidays.git
cd cn_stock_holidays
uv sync --dev  # Install with uv
# or
pip install -e .  # Install with pip

Usage

Import

# For Shanghai/Shenzhen market
import cn_stock_holidays.data as shsz

# For Hong Kong market
import cn_stock_holidays.data_hk as hkex

Core Functions

# Get holiday data
holidays = shsz.get_cached()  # Get from cache or local file
holidays = shsz.get_local()   # Read from package data file
holidays = shsz.get_remote_and_cache()  # Fetch from network and cache

# Trading day operations
is_trading = shsz.is_trading_day(date)  # Check if date is a trading day
prev_day = shsz.previous_trading_day(date)  # Get previous trading day
next_day = shsz.next_trading_day(date)  # Get next trading day

# Get trading days in range
for trading_day in shsz.trading_days_between(start_date, end_date):
    print(trading_day)

# Data synchronization
shsz.sync_data()  # Sync data if expired
shsz.check_expired()  # Check if data needs update

Hong Kong Market with Half-Day Trading Support

# Import Hong Kong market functions
import cn_stock_holidays.data_hk as hkex

# Standard trading day functions (same as Shanghai/Shenzhen)
is_trading = hkex.is_trading_day(date)
prev_day = hkex.previous_trading_day(date)
next_day = hkex.next_trading_day(date)

# Half-day trading detection (Hong Kong market only)
is_half_day = hkex.is_half_day_trading_day(date)  # Check if date is a half-day trading day

# Get data with half-day trading support
holidays, half_days = hkex.get_cached_with_half_day()  # Returns (holidays_set, half_days_set)

# Data synchronization with half-day support
hkex.sync_data_with_half_day()  # Sync data if expired
hkex.check_expired_with_half_day()  # Check if data needs update

Function Details

Help on module cn_stock_holidays.data:

FUNCTIONS
    check_expired()
        Check if local or cached data needs update
        :return: True/False

    get_cached()
        Get from cache version, if not existing, use txt file in package data
        :return: A set/list contains all holiday data, elements with datetime.date format

    get_local()
        Read data from package data file
        :return: A list contains all holiday data, elements with datetime.date format

    get_remote_and_cache()
        Get newest data file from network and cache on local machine
        :return: A list contains all holiday data, elements with datetime.date format

    is_trading_day(dt)
        :param dt: datetime.datetime or datetime.date
        :return: True if trading day, False otherwise

    next_trading_day(dt)
        :param dt: datetime.datetime or datetime.date
        :return: Next trading day as datetime.date

    previous_trading_day(dt)
        :param dt: datetime.datetime or datetime.date
        :return: Previous trading day as datetime.date

    sync_data()
        Synchronize data if expired

    trading_days_between(start, end)
        :param start, end: Start and end time, datetime.datetime or datetime.date
        :return: A generator for available trading dates in Chinese market

Cache Management

From version 0.10 onwards, we use functools.lru_cache on get_cached for better performance. If needed, you can clear the cache using:

get_cached.cache_clear()

Command Line Tools

Data Synchronization

# Sync Shanghai/Shenzhen data
cn-stock-holiday-sync

# Sync Hong Kong data
cn-stock-holiday-sync-hk

Get Trading Days List

# Get trading days between dates
get-day-list --start 2024-01-01 --end 2024-01-31 --daytype workday

# Get holidays between dates
get-day-list --start 2024-01-01 --end 2024-01-31 --daytype holiday

# For Hong Kong market
get-day-list --market hk --start 2024-01-01 --end 2024-01-31 --daytype workday

Keeping Data Up-to-Date

The package includes scripts to check data expiration and fetch updates from the web. You can set up automatic updates using cron:

# Daily sync at midnight
0 0 * * * /usr/local/bin/cn-stock-holiday-sync > /tmp/cn_stock_holiday_sync.log

Find the absolute path of sync commands:

# Shanghai/Shenzhen
which cn-stock-holiday-sync

# Hong Kong
which cn-stock-holiday-sync-hk

Zipline Integration

For algorithmic trading with Zipline:

from cn_stock_holidays.zipline import SHSZExchangeCalendar, HKExchangeCalendar

# Use in Zipline
calendar = SHSZExchangeCalendar()  # Shanghai/Shenzhen
calendar = HKExchangeCalendar()     # Hong Kong

Development

Setup Development Environment

# Clone and setup
git clone https://github.com/rainx/cn_stock_holidays.git
cd cn_stock_holidays

# Install with uv (recommended)
uv sync --dev

# Or with pip
pip install -e .[dev]

Run Tests

# Run all tests
uv run pytest

# Run with coverage
uv run pytest --cov=cn_stock_holidays

# Format code
uv run black .

# Type checking
uv run mypy cn_stock_holidays/

Publishing

This project uses PyPI Trusted Publisher for secure automated publishing. The CI workflow automatically publishes to PyPI when a new tag is pushed.

To publish a new version:

1. Update version in pyproject.toml
2. Create and push a new tag:

   git tag v2.0.1
   git push origin v2.0.1
   

3. The CI workflow will automatically test, build, and publish to PyPI

Security Benefits:

• No need to manage long-lived API tokens
• Short-lived authentication tokens (15 minutes)
• Repository-specific permissions
• Automated OIDC authentication

See Trusted Publisher Setup for detailed configuration instructions.

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Run tests and ensure code quality
5. Submit a pull request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Links

• GitHub Repository
• PyPI Package
• UV Package Manager