About DeadlineDays

DeadlineDays provides browser-side calculators for business days, due dates, SLA deadlines, shipping dates, payroll cutoff dates, and public holidays.

The site is statically exported and designed to work without accounts, databases, or server-stored calculator inputs.

The calculators are built for practical planning tasks such as counting workdays, adding business days, estimating invoice due dates, checking SLA deadlines, planning shipping dates, and reviewing payroll cutoffs.

Many calculators can combine country-based public holidays with the non-working days selected by the user, so a company that does not follow a standard Saturday/Sunday weekend can still model its own schedule.

DeadlineDays does not require login and does not use a server database for calculator inputs. Calculations are intended to run in the browser, with shareable settings kept in the URL when needed.

Results are general planning references. They are not legal, tax, payroll, accounting, employment, contract, SLA, or shipping carrier guarantees.