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Probation Period End Date Calculator

Find the exact date a probation period ends from your start date and its length in months, weeks or days, including any extension, plus the halfway point, a review-meeting date and the last weekday.

Employment start date

Probation length

Unit

Extension (same unit)

End-date convention

Review meeting this many days before the end

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How it works

end = start date + length (calendar months, weeks × 7 or days), minus one day if the period runs "up to" the same date · months that lack the start day end on the last day of the month (Jan 31 + 1 month → Feb 28)

A probation (or trial) period is counted from the first day of employment. A six-month probation starting on October 5 normally covers October 5 up to and including April 4 — the day before the same date six months later — although some contracts say it ends on April 5 itself, so the calculator lets you choose. Extensions are added in the same unit. Because the end date can land on a weekend, the last working weekday and a review-meeting date are shown too, so the decision is made and communicated before probation expires.

Worked example

A job that starts on Monday, October 5, 2026 with a 6-month probation ends on Sunday, April 4, 2027 — 182 days. The last weekday is Friday, April 2, 2027, so a review meeting 14 days before the end would fall on Sunday, March 21, 2027; book it for the Friday before.

Sources: ILO Termination of Employment Convention, 1982 (No. 158)

Frequently asked questions

How do I calculate when my probation ends?

Add the probation length to your start date. For months, go to the same date that many months later and (usually) step back one day: a 3-month probation from January 10 ends on April 9.

Does probation include weekends and holidays?

Yes — probation is counted in calendar time, not working days, unless your contract says otherwise. That is why the end date can fall on a weekend.

Can a probation period be extended?

Often yes, if the contract or policy allows it and the extension is agreed or notified before the original period ends. Enter the extension and the calculator moves the end date.

How long is a typical probation period?

Three to six months is most common; some countries set legal maximums (for example a few months for most workers), and senior roles may have longer periods. Check your contract and local law.

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This calculator is for educational purposes. Double-check important results before acting on them.