With the Acas early conciliation period now able to run to twelve weeks, the tribunal deadline is a computed date, not a guessed one. This worked-arithmetic guide runs three fact patterns – unfair dismissal, discrimination and unpaid wages – through the Day A and Day B rules, shows exactly where the one-month floor bites, and sets out the calendar discipline a claimant needs, including what changes when six-month limits arrive on 1 October 2026.
Written by John Barwell