Which ancient custom, still observed in parts of Wales each spring, involves young men serenading their sweethearts outside their windows during the night?

• A Calennig ✓
• B Noson Lawen
• C Gwyl Ifan
• D Hunting the Wren

Calennig is a New Year's Day tradition in Wales where children go door-to-door singing and receive small gifts, derived from the Latin 'kalendae' meaning the first day of the month.