Belgium Working Days Calculator
Count working days between any two dates using Belgium's national public holiday calendar. Belgium observes 10 national holidays, including Belgian National Day on 21 July and Armistice Day on 11 November — both unique to Belgium among major EU trading partners. Working day rules vary by country; Belgium also has community-specific regional holidays not captured by national legislation.
Belgium Working Days Calculator
Covers Belgium's 10 national public holidays for 2025. Belgium has additional community-specific holidays that vary by region (Flemish, French-speaking, and German-speaking communities) which are not included here. Always verify dates for legally binding deadlines.
Formula
Working Days = Weekdays − National public holidays falling on weekdays
Count all Monday–Friday days in the range, then subtract any of Belgium's national public holidays that fall on those weekdays. Regional community holidays (e.g. 11 July for Flanders) are not included.
Worked Example
Scenario: A Brussels-based supplier quotes a 15 working day delivery window starting Monday 14 July 2025.
Belgian National Day falls on Monday 21 July 2025 — a weekday — and counts as one excluded holiday.
15 working days + 1 national holiday = 16 weekdays forward
Result: deadline falls on ~5 August 2025
If your Brussels supplier is Flemish-facing, also check 11 July (Flemish Community Day) — many Flemish businesses close on this date even though it is not a national holiday.
Common Mistakes
- Missing community holidays. 11 July (Flemish Community Day), 27 September (French Community Day), and 15 November (German-speaking Community Day) are not national holidays but close offices in their respective regions. Many Flemish and Walloon businesses observe these as non-working days.
- Overlooking Armistice Day (11 November). Belgium is one of the few EU countries that observes 11 November as a national holiday. This is not a public holiday in Germany, France, Spain, or the Netherlands.
- Assuming Belgian and Dutch holidays align. Despite geographic proximity and a shared language (Dutch/Flemish), Belgium and the Netherlands have different national holidays. Belgian National Day (21 July) does not exist in the Netherlands.
How to Use
- 1
Enter start and end dates
Select the period you want to measure. Both dates are inclusive.
- 2
Click Calculate
The tool counts Monday–Friday days and deducts Belgium's 10 national public holidays for 2025.
- 3
Review excluded holidays
The result shows working days and names any national holidays excluded within the range.
- 4
Add community holidays if needed
For Flemish-region counterparts, manually adjust for 11 July. For French-speaking regions, check 27 September.
Frequently Asked Questions
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