twdate

中文版

A simple Python package to convert between the Gregorian calendar and the Taiwanese (Minguo) calendar.

Installation

pip install twdate

Usage

Create a Minguo date

from twcal import TWDate

d = TWDate(115, 3, 20)  # 民國115年3月20日

Convert between Gregorian and Minguo

import datetime
from twcal import to_minguo, to_gregorian

# Gregorian -> Minguo
tw = to_minguo(datetime.date(2026, 3, 20))
# TWDate(year=115, month=3, day=20)

# Minguo -> Gregorian
gd = to_gregorian(tw)
# datetime.date(2026, 3, 20)

Get today's date in Minguo format

from twcal import today

d = today()
print(d)  # 民國115年3月20日

Format as string

d = TWDate(115, 3, 20)

d.to_string()        # '民國115年3月20日'
d.to_short_string()  # '1150320'
str(d)               # '民國115年3月20日'

Parse from short string

d = TWDate.from_short_string("1150320")
# TWDate(year=115, month=3, day=20)

Pre-Minguo dates

import datetime
from twcal import to_minguo

d = to_minguo(datetime.date(1911, 1, 1))
# TWDate(year=-1, month=1, day=1)

print(d)  # 民國前1年1月1日

CLI

# Show today's date in Minguo format
twdate now

# Convert Gregorian to Minguo
twdate convert 2026-03-20

# Convert Minguo to Gregorian
twdate convert -g 115-03-20

Comparison

from twcal import TWDate

TWDate(115, 1, 1) > TWDate(114, 12, 31)   # True
TWDate(114, 1, 1) < TWDate(115, 1, 1)     # True

Validation

from twcal import TWDate

TWDate(0, 1, 1)    # ValueError: 民國0年不存在
TWDate(115, 2, 30) # ValueError: day is out of range for month

License

This project is licensed under the MIT License. You are free to use, modify, and distribute this software for any purpose, including commercial use.