Deadline Calculator

When this calculator is useful

Across the EU, deadlines are typically expressed as a duration counted from a starting point, and doing that arithmetic in your head is where errors slip in. Use this calculator whenever you have a start date and a period to add: a project due 90 days after sign-off, a notice period on a lease or employment contract, an invoice payable within 30 days, or a statutory window such as the 14-day right of withdrawal under the EU Consumer Rights Directive. You enter the start date and the amount, and it returns the precise deadline plus the day of the week.

It suits the practical questions people across the euro area face: when does a payment term actually expire, what date is 'within 21 days', and if a service is promised in six weeks, which day does that fall on. Because the amount can be negative, it also runs in reverse — start from a fixed deadline and count backwards to find the date you have to begin.

Understanding your result

The result is one calendar date together with its weekday, and the weekday is frequently the detail that matters. A deadline that lands on a Saturday or Sunday is little help if the office, court, or bank involved is closed, so check the day of the week before you rely on it. This tool weighs every day equally and does not skip weekends.

Be clear whether your deadline is meant in calendar days or working days. 'Within 30 days' generally means calendar days, weekends included — délai, Frist, and termine usually default to calendar days. 'Within 14 working days' (jours ouvrables, Werktage, giorni lavorativi) means business days only, which stretches further once weekends and public holidays come out. This calculator handles calendar days; for working-day counts, use the Working Days Calculator instead.

A worked example

Imagine you place an online order on 04/06/2026 and want to know the last day of the 14-day withdrawal window under the Consumer Rights Directive. Adding 14 days gives 18/06/2026 — a Thursday, so the office handling a return would be open. If instead a supplier offered 30-day payment terms from that same date, adding 30 days would land you on 04/07/2026, a Saturday, which the weekday flag flags immediately as a date you may want to bring forward to the preceding business day.

Points to be careful about

Across the euro area the recurring traps are counting the wrong kind of day and starting the count from the wrong point.

• Confusing 'working days' with 'calendar days' — the difference between '14 days' and '14 working days' can be most of a week.
• Forgetting a deadline can fall on a weekend or a public holiday, when the office that must receive your document is closed.
• Counting from the wrong day — national rules differ on whether the period runs from the day of an event or the following day, so read the wording carefully.
• Assuming one country's holiday calendar applies everywhere — public holidays differ sharply from one member state to the next.

EU public holidays and deadlines

The defining regional factor in the EU is that public holidays are not harmonised — they vary substantially from one member state to the next, and often by region within a single country. Germany sets many holidays at the Länder level, Spain layers national, regional, and local holidays, and dates such as Assumption, All Saints, Corpus Christi, or national days are observed in some countries and not others. So a 'within 10 working days' deadline can resolve to a genuinely different date in Munich than in Madrid or Milan.

This calculator works in pure calendar days and does not skip any public holidays, which is correct when your deadline is specified in calendar days — and many EU consumer-law deadlines, like the 14-day withdrawal right, are calendar-day deadlines. But where wording says 'working days', or a process rolls a due date to the 'next working day', you must check the public-holiday list for the specific member state and region, then shift the result by hand. For binding deadlines under public-procurement rules or national civil-procedure law, follow the official instrument or a qualified local adviser rather than a plain calendar count.