Hanukkah Begins

Hanukkah commemorates the rededication of the Second Temple in Jerusalem and is observed for eight nights, with an additional candle lit on the menorah each evening. Because the Jewish day begins at sunset rather than midnight, the festival starts on the evening before the calendar date, and the exact moment depends on local sunset, so it begins at a different clock time in every city. Sundown in Jerusalem in early December is around 4:40pm local time, roughly 2:40pm in Wales.

Note: this date follows a lunar or announced calendar rather than a fixed rule. Please confirm it against an official source before making plans around it.