Guide de la calculatrice jours ouvrés et jours fériés

What This Calculator Does

This page is not just counting days. It is answering the scheduling question that teams actually care about: if something starts on a given date, when does it likely finish once weekends and holidays are taken into account, and how many true working days exist inside that span?

That makes it especially useful for first-pass planning and communication. In project work, client commitments, leave planning, and cross-border coordination, people often need a timeline they can discuss before they need a legally definitive calendar. The page helps by showing an estimated end date, working-day totals, holiday counts, and a monthly breakdown in one place.

When to Use It

• You are building a project schedule or delivery estimate.
• You want to see how weekends and holidays stretch a timeline.
• You need a rough working-day view under China or US holiday rules.
• You want to export a shareable table for teammates, clients, or managers.

Inputs Explained

Start Date

The start date is the anchor for the entire timeline. The practical question to settle first is whether that date itself counts as day one. The include-start option exists because many schedule disagreements begin right there.

Counting Mode

The page supports both calendar-day and working-day thinking. Calendar-day mode is right for questions like "what date is 30 days from now," while working-day mode is better for management questions like "when will 10 working days be complete."

Country and Holiday Settings

The built-in holiday logic currently focuses on China and the United States. When holiday exclusion is enabled, known holidays are treated as non-working days. That still does not mean every special closure, makeup day, or organization-specific exception is covered.

How the Calculation Works

The page walks forward one day at a time from the chosen start date. Depending on the selected mode, it counts either total days or qualifying working days. During that pass it marks weekends and built-in holidays, then rolls those into both the summary result and the monthly detail view.

That model is very useful for schedule estimation, but it is still a simplified model. In China, makeup workdays are not fully represented. In formal settings, companies, schools, courts, banks, and government workflows may all follow rules that differ from the page's defaults. So the page is best used as a strong draft answer, not a final authority.

Example

Suppose a task starts on a Monday and you want to estimate the date that is 10 working days away. The page will skip weekends, optionally skip built-in holidays, and then return an end date together with the number of working days and holidays encountered along the way.

If you switch to calendar-day mode, the answer may shift because the page is now solving a different question. That is why the most important planning habit is often not more calculation. It is being explicit about whether the team is speaking in calendar days or working days.

How to Understand the Result

End Date

This is the headline result, but it only makes sense together with the selected mode and holiday settings. The same start date can lead to very different answers depending on those choices.

Working Days, Total Days, and Holidays

This group explains why a timeline grew longer or shorter. It is especially useful for expectation management because many disputes are really about what counts as usable work time.

Monthly Details and Export

The monthly breakdown is good for sharing and for spotting which months carry the heaviest holiday impact. CSV and XLS export are already enough for most planning conversations and spreadsheet follow-up.

Common Mistakes

• Treating a planning estimate as if it were an official legal or contract deadline.
• Forgetting to decide whether the start date counts.
• Failing to say whether the conversation is in calendar days or working days.
• Assuming built-in holidays cover every temporary closure or institution-specific rule.

FAQ

Why can the result differ from our company calendar?

Because companies often have custom closure days, makeup workdays, shifts, or local practices, while the page uses a more general built-in holiday model.

Is this suitable for visa, court, or tax deadlines?

Not by itself. Those cases should always be checked against the official governing calendar and rules.

Can I share the exported file with my team?

Yes. CSV and XLS export are practical for sharing and further editing.

Why can China holiday results differ from actual work arrangements?

One major reason is that the current page does not fully model China makeup workdays, so complex holiday periods should be read as estimates.

Notes

The real value of this tool is that it turns vague schedule intuition into a structured planning view. It is very effective before you enter formal approval, legal, or policy-heavy workflows.

Once the question affects contracts, taxes, courts, visas, payroll, or formal HR policy, the page should stop being the sole source of truth. Treat it as a high-quality estimator rather than an official ruling engine.