Business Days, Federal Holidays, and Project Deadline Math
Standard contract clauses (e.g."30 business days to deliver") exclude weekends and federal holidays. Always count business days, not calendar days."5 business days" usually means 5 working days — so 5 actual elapsed days if no holidays intervene, up to 7 if a holiday lands on a Monday or Friday.
1. US Federal Holidays (2024-2025)
2. Contract & Deadline Math
Standard contract clauses (e.g."30 business days to deliver") exclude weekends and federal holidays. Always count business days, not calendar days."5 business days" usually means 5 working days — so 5 actual elapsed days if no holidays intervene, up to 7 if a holiday lands on a Monday or Friday.
3. International Variations
- UK: 8 bank holidays. Easter (Good Friday + Easter Monday), Boxing Day.
- Canada: 10 federal holidays. Includes Canada Day (Jul 1) and Civic Holiday.
- Australia: 8 national holidays (10 in some states). ANZAC Day is observed.
- Middle East: Friday-Saturday weekend. Islamic holidays shift annually.
4. Project Planning
When estimating project timelines, add 15-20% buffer beyond pure business-day math to account for unexpected delays (sick days, vendor delays, scope creep). For critical deadlines, build backward from the due date using working days — start with the deadline, count back, and that's your true drop-dead start date.
Business Days, Holidays, Deadline Math
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