WORKDAY.INTL Function in Excel: Due Date With Your Own Weekend

WORKDAY.INTL Function in Excel: Due Date With Your Own Weekend featured illustration

📎 This article includes 1 downloadable practice file ↓

⏱ 2 min readUpdated 28 September 2026

DateLevel: ExpertAvailable in: Excel 2010+

In this article
  1. Syntax
  2. Examples
  3. Example 1
  4. WORKDAY.INTL in practice
  5. Where you will use it
  6. Worked example
  7. Mistakes people make
  8. Related functions
  9. Continue learning

WORKDAY.INTL adds working days with a custom weekend — delivery or SLA dates for a six-day operation.

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Syntax

=WORKDAY.INTL(start, days, [weekend], [holidays])
Argument What it means
days Negative to go backwards.

Examples

Example 1

=WORKDAY.INTL(A2, 5, 11, Holidays)

Five working days later, Sundays and holidays off.

WORKDAY.INTL in practice

Where you will use it

  • Due dates with Sunday-only weekends
  • Shops closed on a weekday
  • Six-day weeks

Worked example

10 working days after Friday 2 October 2026.

Weekend codeFormulaResult
11=TEXT(WORKDAY.INTL(DATE(2026,10,2),10,A2),"ddd dd-mmm")Wed 14-Oct
1=TEXT(WORKDAY.INTL(DATE(2026,10,2),10,A3),"ddd dd-mmm")Fri 16-Oct
0000011=TEXT(WORKDAY.INTL(DATE(2026,10,2),10,A4),"ddd dd-mmm")Fri 16-Oct

Results calculated in Excel.

Mistakes people make

MistakeWhat to do instead
Codes11 = Sunday only, 1 = Sat+Sun
Holidays4th argument

WORKDAY · NETWORKDAYS.INTL

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📎 Practice files for this article

  • 📗
    Practice workbook: Dates & times22 tasks on realistic sales data — type your formula, the Check column turns green when it is right. Answers sheet included.
    ⬇ XLSX · 34 KB

Free to use for learning. Files with macros (.bas) are plain text — import them with Alt+F11 → File → Import File, and always test on a copy.

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