Guides
Twenty-five practical reference guides on business days, payment terms, court filings, payroll, freight, and the day-counting rules that show up across professional work.
Payment Terms & Invoicing
What Is Net 30? Payment Terms Explained
What Net 30 means, how to calculate the due date, and how it compares to Net 60 and Net 90.
Updated: November 18, 2025
What Is Net 60? Payment Terms Explained
How Net 60 payment terms work and when they are used in supplier and contractor agreements.
Updated: December 2, 2025
What Is Net 90? Payment Terms Explained
How Net 90 payment terms work, typical industries that use them, and cash flow implications.
Updated: December 16, 2025
How to Write Payment Terms on an Invoice
Clear guidance on writing Net 30, Net 60, and other payment terms on professional invoices.
Updated: March 31, 2026
DSO Calculation: Days Sales Outstanding Explained
DSO formula, calendar vs business day variants, industry benchmarks, and cash flow implications.
Updated: May 2, 2026
How Payroll Cut-off Dates Work With Weekends and Holidays
ACH settlement under NACHA, the 27th paycheck year, and pay-early vs pay-late around Fed holidays.
Updated: May 2, 2026
Calculations & Methods
Business Days vs Calendar Days: What Is the Difference?
The key differences between business days and calendar days, and when each applies.
Updated: November 4, 2025
How Many Business Days Are in a Month?
A month-by-month breakdown of working days and how weekends and holidays affect the count.
Updated: January 6, 2026
How Many Business Days Are in a Year?
The total number of working days in a year and how the count varies by country and calendar.
Updated: January 20, 2026
When Are Bank Holidays Observed if They Fall on a Weekend?
Weekend observance rules in the US, UK, Canada, Australia, and continental Europe.
Updated: May 2, 2026
What Does 'Within X Business Days' Mean on Official Notices?
When day 0 starts, same-day vs next-day receipt, and the time-of-day question.
Updated: May 2, 2026
What Happens When a Payment Due Date Falls on a Weekend or Holiday?
Standard conventions for rolling due dates forward or backward when they land on non-business days.
Updated: March 3, 2026
Legal & Compliance
What Is a Business Day in Court Filings?
Federal Rule 6, the CM/ECF time stamp, the 3-day mailing rule, and UK CPR Part 2.
Updated: May 2, 2026
Statute of Limitations and Business Days vs Calendar Days
Why limitations periods are calendar days and procedural deadlines often use business days.
Updated: May 2, 2026
How SLA Response Times Work
How service level agreements define response and resolution windows in business days.
Updated: March 17, 2026
Tax & Finance
How to Count Business Days for Tax Filing Deadlines
IRS, HMRC, India ITR, and Philippine BIR deadline counting rules with the controlling statutes.
Updated: May 2, 2026
US Federal Holidays 2026
The complete list of US federal holidays in 2026 with dates and observed days.
Updated: April 14, 2026
US Federal Holidays 2027
The complete list of US federal holidays in 2027 with dates and observed days.
Updated: April 28, 2026
Wire Transfer Cut-off Times by Bank
Fedwire, CHAPS, RTGS, and NPP cutoffs at major US, UK, Canadian, Australian, and Indian banks.
Updated: May 2, 2026
International Remittance Settlement Times by Corridor
SWIFT, SEPA, PIX, UPI, and Wero settlement timing for the major remittance corridors.
Updated: May 2, 2026
Operations
How SaaS Contracts Handle the 'Support During Business Hours' Clause
Time zone interpretation, follow-the-sun coverage, and the SLA business-hour clock pause.
Updated: May 2, 2026
How Freight Forwarders Count Transit Days vs Business Days
Port-to-port vs door-to-door, customs hold days, and demurrage and detention math.
Updated: May 2, 2026
Procurement Lead Times: Business Days Math for Supply Chain
Lead time decomposition, Lunar New Year and Golden Week effects, and buffer stock formulas.
Updated: May 2, 2026