Jury duty refers to the civic obligation of eligible citizens to serve as jurors in criminal or, less commonly, civil trials when summoned by a court. It involves attendance at court, consideration of evidence, application of the judge’s directions on law, and reaching a verdict as part of a jury panel. In England and Wales, Scotland and Northern Ireland, this duty arises under statutory frameworks such as the Juries Acts, which set out eligibility, disqualification, excusal and deferral grounds, and the procedure for jury selection. In Ireland, similar provisions exist under the Juries Acts 1927–2017. Jury duty is compulsory subject to limited statutory excuses (e.g. certain criminal convictions, health reasons, or specific professional exemptions). Failure to comply with a jury summons can constitute a criminal offence or contempt of court. Employers must generally allow time off for jury service, with varying rules on payment. Across the UK and Ireland, the concept and practical operation of jury duty are broadly consistent, though details such as age limits, eligible occupations, trial types using juries, and available excusals differ between jurisdictions.