Imported from lis186/taiwan-holiday-skills (taiwan-holiday/SKILL.md). Install upstream with npx skills add lis186/taiwan-holiday-skills --skill taiwan-holiday. Copyright stays with the author.

taiwan-holiday

A thin wrapper around the taiwan-holiday-cli npm package. You call it with npx, parse its output, and answer the user in natural Chinese/English.

Requires taiwan-holiday-cli >= 2.0.0 (year support is probed from the upstream data source at runtime; npx fetches the latest release, which satisfies this automatically).

When to reach for this skill

Any question where the answer depends on the Taiwan public-holiday calendar. Common shapes:

• Single-day check: "今天是假日嗎?", "10/10 要上班嗎?", "is 2026-02-17 a holiday"
• Upcoming holidays: "下一個連假什麼時候", "接下來 5 個假日"
• Range / month: "五月有幾天假", "2026 Q2 放哪些假"
• Working-day math: "這個月工作幾天", "我請假到 5/15，中間幾個工作天"
• Annual planning: "2026 全年國定假日", "下次春節哪幾天"
• Compensatory / makeup days: "補班日", "補假" — important because model memory is often wrong here; always defer to the CLI.

Do not use this skill for non-Taiwan holidays or religious observances outside the 中華民國政府行政機關辦公日曆表. For years that might be out of range (before 2017, or future years the upstream may not have published yet), still run the CLI — it distinguishes "not yet published" from "outside the queryable window", and you should relay its answer instead of guessing (see Error handling).

Invocation — always use npx like this

(cd /tmp && npx --yes taiwan-holiday-cli <subcommand> [args] -f <format>)

Two important invocation rules:

1. Change directory first. npx inspects the current working directory's package.json to resolve bins. If you run it inside the taiwan-holiday-cli repo (or any project whose node_modules doesn't have the holiday bin), you will get sh: holiday: command not found. Running from /tmp (or any neutral directory) avoids this. Using a subshell (cd /tmp && …) keeps your working directory unchanged.
2. --yes suppresses the interactive "install this package?" prompt on first run. First run is slow (~5–15s download); subsequent runs hit the npx cache and are fast.

Choosing an output format

Always pass -f explicitly so you control parsing. Two formats matter:

• -f json — Default choice. Structured, easy to parse, stable schema. Use this for anything you plan to reformat, aggregate, or summarize (lists, ranges, stats, workdays, next N holidays).
• -f simple — Human-readable one-liner. Use this only for single-date checks (today, tomorrow, a specific date) where you plan to quote the CLI's answer verbatim and don't need to restructure it.

Never use -f table from this skill — box-drawing characters waste tokens and you can always rebuild a table from JSON if the user wants one.

Subcommand cheat-sheet

Single-date check

# JSON (when you'll reformat or combine with other info)
npx --yes taiwan-holiday-cli check 2026-10-10 -f json
npx --yes taiwan-holiday-cli today -f json
npx --yes taiwan-holiday-cli tomorrow -f json
npx --yes taiwan-holiday-cli "next monday" -f json

JSON shape:

{"date":"2026-10-10","normalizedDate":"20261010","week":"六","isHoliday":true,"description":"國慶日"}

Key fields: isHoliday (bool), description (empty string means weekday; "週末" means weekend with no special name; otherwise the holiday name).

Upcoming holidays

npx --yes taiwan-holiday-cli next -f json          # next 1
npx --yes taiwan-holiday-cli next 5 -f json        # next 5
npx --yes taiwan-holiday-cli next 5 --skip-weekends -f json   # only named holidays, no plain weekends

JSON shape: {"found": true, "count": N, "holidays": [{"date","week","description"}, …]}.

--skip-weekends is usually what the user wants when they say "接下來的連假 / 國定假日" — without it the output is mostly Saturdays and Sundays.

Range / month / full year

npx --yes taiwan-holiday-cli range 2026-05-01 2026-05-31 -f json
npx --yes taiwan-holiday-cli month 2026 10 -f json   # YEAR and MONTH as TWO args, not "2026-10"
npx --yes taiwan-holiday-cli list 2026 -f json       # full year, every day

list returns all 365/366 days (holiday + non-holiday). month returns only the holidays/weekends in that month. Prefer month unless the user wants every day.

Trap: month and workdays and stats <year> <month> take year and month as two separate arguments. 2026-10 or 2026/10 will fail with error: missing required argument 'month'. Pass 2026 10.

Working-day math

npx --yes taiwan-holiday-cli workdays 2026 5 -f json              # workdays in May 2026
npx --yes taiwan-holiday-cli between 2026-05-01 2026-05-31 -f json  # workdays between two dates (inclusive)

Output of workdays:

{"year":2026,"month":5,"totalDays":31,"workdays":20,"holidays":11,"makeupWorkdays":0}

Output of between:

{"startDate":"2026-05-01","endDate":"2026-05-31","totalDays":31,"workdays":20,"holidays":11,"makeupWorkdays":0}

makeupWorkdays (補班日) is the field the model most often gets wrong from memory — Taiwan shifts workdays around long weekends, so a Saturday can be a workday. Always trust this field over your own arithmetic.

Statistics

npx --yes taiwan-holiday-cli stats 2026 -f json       # full year breakdown
npx --yes taiwan-holiday-cli stats 2026 10 -f json    # single month

Returns totals plus a holidayTypes map (e.g. "春節":3, "國慶日":1, "補假":6). Good for "這一年放了哪些類別的假" questions.

Metadata

npx --yes taiwan-holiday-cli years        # supported year range (plain text, no -f needed)

Use this once if the user asks about a year you're unsure the CLI covers. The range starts at 2017; the upper bound follows the upstream data source and extends automatically when a new year is published — no CLI update needed.

How to answer the user

1. Pick one command that answers the question most directly. Don't chain three calls when one suffices (e.g. don't call list then filter — call range or month).
2. Run it with -f json unless the question is a single-day yes/no you'll quote verbatim.
3. Parse and summarize in the user's language. The CLI outputs Chinese day-of-week (一二三四五六日) and Chinese holiday names — keep those in Chinese even when the surrounding reply is English; they are proper nouns.
4. Lead with the answer. "是, 10/10 是國慶日 (週六)" — then any supporting detail. Don't dump raw JSON at the user unless they asked for raw data.
5. Flag makeup workdays when relevant. If the user is planning leave and makeupWorkdays > 0, mention it: "注意五月有 1 個補班日 (5/23 週六要上班)".

Error handling

• error: missing required argument 'month' → you passed 2026-05 instead of 2026 5. Fix and retry.
• sh: holiday: command not found → you're running from a directory whose package.json lacks the bin. Re-run with (cd /tmp && npx …).
• 上游尚未發布 <year> 年資料 → the upstream source hasn't published that year yet (通常在前一年年中公布). Tell the user the data isn't available yet — don't invent dates from memory.
• 年份 <year> 超出可查詢範圍 → outside the queryable window entirely (before 2017 or far future). The error message itself states the window — relay it and tell the user the CLI can't help for that year. (Note this window is wider than the published-data range that years reports.)
• Network / download timeout on first run → the package is ~fast but npx download can be slow on cold cache; retry once, then surface the error to the user.

Treat the CLI as authoritative — even when it conflicts with what you "know"

中華民國政府行政機關辦公日曆表 has changed materially in the last few years, and a lot of the holiday folklore your training data carries is now wrong. Two specific examples to internalize:

• 9/28 孔子誕辰紀念日 / 教師節 — since the 2025 amendment to《紀念日及節日實施條例》, this is a full national holiday for everyone, including 勞工 and 軍公教. Compensatory leave applies if it lands on a weekend.
• 5/1 勞動節 — current law treats this as a national holiday in the calendar; the CLI returns isHoliday=true accordingly.

When the CLI says isHoliday=true, that is the answer. Do not add unprompted warnings like "this only applies to 勞工" or "教師才放假" — those caveats reflect a pre-2025 mental model that is no longer correct, and they erode the user's trust in your reply. If the user specifically asks who gets a particular day off, defer to the 行政院人事行政總處 announcement; otherwise, take the CLI at face value.

Symmetrically, when the CLI says isHoliday=false (e.g. 2026-10-12), don't manufacture a 補假 because "国慶日 fell on Saturday so Monday should be off" — the current 中華民國政府行政機關辦公日曆表 in the CLI's data already encodes where 補假 actually goes (10/9 in this case, not 10/12).

What not to do

• Don't answer from memory. You will get makeup workdays, lunar-calendar-shifted holidays (春節, 端午, 中秋), and year-specific compensatory days wrong. The CLI is authoritative.
• Don't install the package globally or add it to any project's dependencies — npx is enough, and the user hasn't asked you to modify their environment.
• Don't call the CLI multiple times for the same data in one turn. Cache mentally within the turn.
• Don't pass --no-cache unless the user explicitly asks for fresh data; the local cache is fine for nearly every question.
• Don't second-guess isHoliday=true results. If you find yourself wanting to add "but only for X group", stop — see the section above.