China Holiday Calendar Sync

Use only official gov.cn holiday notices as the source of truth for China holiday and adjusted-workday schedules.

Keep the workflow conservative:

• Prefer configured notice_urls first.
• Use China government policy search for discovery before any public-search fallback.
• Parse official notice正文 into structured holiday/workday rows.
• Treat future-year discovery as low-frequency work, not a daily poll.

Workflow

1. Load configured notice URLs.

   • Reuse known official notice URLs from local config first.
   • For already-synced years, prefer local calendar storage instead of refetching the notice page.

2. Discover missing future-year notices carefully.

   • Build exact queries around 国务院办公厅关于\x3Cyear>年部分节假日安排的通知.
   • Prefer China government policy search.
   • Accept only https://www.gov.cn/zhengce/content/... candidate pages.
   • Re-fetch the candidate and validate title/body before trusting it.

3. Throttle discovery.

   • For future years, probe at most once per month.
   • Default probe window starts on the 15th of the month.
   • Cache both positive and negative discovery results for that month.

4. Parse official notice content.

   • Extract holiday ranges such as 1月1日至3日.
   • Extract adjusted workdays such as 1月4日（周日）上班.
   • Emit normalized rows with date, is_holiday, is_workday, holiday_name, and source_url.

5. Persist two layers separately.

   • Stable source mapping in notice_urls
   • Probe history in discovery_cache

Rules

• Do not use third-party holiday calendars as authoritative data.
• Do not fabricate future-year schedules before an official notice exists.
• If a future year has not been published yet, return no URL and cache that negative check for the month.
• If a year is already present in local holiday storage, do not refetch the official notice unless the caller explicitly wants a refresh.

References

• For source priority, parsing regex patterns, and caching rules, read references/official-notice-method.md.

Output Shape

Normalize notice parsing results into a shape close to:

{
  "date": "2026-10-08",
  "is_holiday": false,
  "is_workday": true,
  "holiday_name": "国庆节调休上班",
  "source_url": "https://www.gov.cn/zhengce/content/202511/content_7047090.htm"
}