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Mainland China Working Days Between Dates

Counts official mainland China working and non-working days in a date range using State Council holiday periods and weekend makeup workdays rather than a simple Monday-Friday rule.

When to use

You need the number of official mainland China working days in a 2024-2026 date range for an SLA, payroll, project or delivery estimate.

Do not use when: You need only elapsed calendar days, another jurisdiction, an industry-specific settlement calendar, or dates outside 2024-2026.

Example user requests

How many official China working days are there from 2026-09-18 through 2026-09-25, inclusive?
计算2026年国庆节前后这段日期中实际需要上班的天数，要包含调休周末。
Count mainland China business days between 2025-01-24 and 2025-02-10.

Formula

for each included date: working_days += is_working_day(date); non_working_days += not is_working_day(date)

The endpoints are included by default. If end_date is earlier, endpoints are swapped before applying include_start_date/include_end_date. Official exceptions override the ordinary weekday/weekend rule.

Inputs

Parameter	Type	Required	Description
`start_date`	date	yes	First date of the range (YYYY-MM-DD), within 2024-2026.
`end_date`	date	yes	Last date of the range (YYYY-MM-DD), within 2024-2026. Earlier dates are normalized and reported in a note.
`include_start_date`	boolean	default true	Whether start_date participates in the count.
`include_end_date`	boolean	default true	Whether end_date participates in the count.

Outputs

Output	Type	Unit	Description
`normalized_start_date`	date		Earlier endpoint after normalization.
`normalized_end_date`	date		Later endpoint after normalization.
`working_days`	integer	working days	Official working dates in the selected inclusive/exclusive range.
`non_working_days`	integer	days	Official holiday-period dates and regular weekends in the selected range.
`calendar_days_counted`	integer	days	Total dates included after endpoint rules.
`adjusted_workdays_counted`	list		Weekend makeup workdays included in the count.
`holiday_dates_counted`	integer	days	Dates inside official holiday periods that were counted as non-working.
`source_document_ids`	string_list		Official notice identifiers used across the range.
`dataset_version`	string		Version of the source-traceable mainland China work-calendar package.
`coverage_start`	date		First supported date in this package.
`coverage_end`	date		Last supported date in this package.

Example

Range containing an adjusted Sunday and Mid-Autumn holiday: {"start_date":"2026-09-18","end_date":"2026-09-25","include_start_date":true,"include_end_date":true} → {"working_days":6,"non_working_days":2,"calendar_days_counted":8,"adjusted_workdays_counted":[{"date":"2026-09-20","related_holiday":"National Day","related_holiday_zh":"国庆节"}],"holiday_dates_counted":1}

GET https://tttkmbb.com/api/v1/calculate/china-working-days-between?start_date=2026-09-18&end_date=2026-09-25&include_start_date=true&include_end_date=true

Machine access

API: GET https://tttkmbb.com/api/v1/calculate/china-working-days-between (query parameters) or POST with a JSON body {"inputs": {...}}
Schema: https://tttkmbb.com/api/v1/calculators/china-working-days-between · Markdown: https://tttkmbb.com/everyday/china-working-days-between.md · JSON definition: https://tttkmbb.com/everyday/china-working-days-between.json
MCP: server https://tttkmbb.com/mcp, tool count_china_working_days
OpenAPI operationId: count_china_working_days
Freshness: static. Authentication: none. Rate limit: fair use (see rate limits).

Sources

FAQ

Why is the result different from counting Monday-Friday?

Official holiday periods can include weekdays, while designated weekend makeup days can be working days. Both exceptions are applied before the normal weekday rule.

Are both endpoints included?

Yes by default. Set include_start_date or include_end_date to false when a contract or SLA excludes an endpoint.

Related calculators

Mainland China Working Day Checker — Inspect one date and its official source.
Add Mainland China Working Days — Find a deadline after a working-day offset.
Date Difference Calculator — Calendar-day and simple Monday-Friday difference.