Business date planning
Plan deadline dates without sending your inputs to a server.
DeadlineDays will provide multilingual, browser-side tools for business days, invoice due dates, SLA deadlines, shipping dates, payroll cutoffs, and holidays.
MVP calculators
These calculator pages are planned next. This step prepares their shared data, translations, and routing foundation.
Business Days Calculator
Count working days between two dates with weekend and holiday settings.
Add Business Days
Add or subtract working days from a start date to estimate a target date.
Invoice Due Date Calculator
Estimate payment due dates using net terms, weekends, and holidays.
SLA Deadline Calculator
Plan service deadlines from a start time and business-day rules.
Shipping Date Calculator
Estimate ship-by or delivery windows with working-day assumptions.
Payroll Cutoff Calculator
Find payroll cutoff dates before paydays while accounting for weekends.
Working Days in Month
See how many working days are in a selected month and country setup.
Public Holidays
Review holiday data planned for business-day and deadline calculations.
Initial country coverage
Country defaults will help calculators start with sensible weekends, locales, and timezone examples.
Privacy-friendly by default
No login. No database. Calculator inputs are not stored on a server.
This site provides general date-planning information and is not legal, tax, payroll, shipping, or financial advice.
Static multilingual business date calculators for deadlines, due dates, working days, and public holidays.