Somerset Day was selected by public vote from a shortlist that includes: 19 May – Feast of St Dunstan; 6 July – Battle of Sedgemoor.
The battle of Albuera (1811) took place during the Peninsular War, when Anglo-Portuguese forces defeated the French.
The 57th (West Middlesex) Foot suffered very heavy casualties during the battle and later celebrated the anniversary as a regimental day.
St Aldhelm (639–709) was Abbot of Malmesbury and Bishop of Sherborne.
Wiltshire Day takes place annually on 5 June.
It commemorates the first raising of the Wiltshire Flag at County Hall, Trowbridge (2007).
Sussex Day takes place annually on 16 June, the feast of St Richard of Chichester (1197–1253), the patron saint of Sussex.
Also known as Richard de Wych, the saint was bishop of Chichester.
Suffolk Day takes place annually on 21 June.
Former BBC radio presenter Mark Murphy created the event in 2016.
It has since become a staple in the Suffolk calendar, hosted by towns across the county.
Mercia Day takes place annually on 22 June, the feast of St Alban.
St Alban is the first recorded British Christian martyr, by tradition beheaded in Verulamium (modern St Albans) during the third or fourth centuries.
Black Country Day celebrates the installation of the first practical steam engine by Thomas Newcomen (1712).
Hampshire Day takes place annually on 15 July, the Feast Day of St Swithun.
St Swithun was Bishop of Winchester (852–63) and subsequently patron saint of Winchester Cathedral.