North Riding Day takes place annually on 22 August.
It marks the date of the battle of the Standard (1138), when English forces defeated the Scots near Northallerton.
The name of the battle derives from the consecrated banners of the minsters of Durham, York, Beverley and Ripon.
These flew from a mast mounted on a cart that marked the centre of the English position.
East Riding Day takes place annually on 24 August.
It marks the birthday of Hull-born MP William Wilberforce (1759–1833), leader of the movement to abolish the slave trade.
Northumbria Day takes place annually on 31 August, the feast of St Aidan.
Aidan of Lindisfarne (d. 651) was a monk and missionary.
He founded Lindisfarne Priory and by tradition converted the Northumbrians to Christianity.
Rutland Day takes place annually on 13 September.
It marks the defeat of the ‘Grand Assault’ during the siege of Gibraltar in 1782.
Among the defenders were the men of the 58th (Rutlandshire) Regiment of Foot.
Derbyshire Day takes place annually on 22 September.
BBC Radio Derby presenter Andy Whittaker organised a vote, and the chosen date commemorates the first raising of the flag.
Alternative suggestions included: 28 July – Derby, the county town, granted city status; 12 May – the birthday of Florence Nightingale, who spent her early years in the county.
Cumberland Day takes place each year on 24 September.
It marks the anniversary of the baptism of renowned local character John Peel (1776-1854).
Montmouthshire Day takes place each year on 25 September, the feast of Saint Cadoc or Cadog (born c. 497).
Cadoc was the founder of the monastery of Llancarfan, and a pioneer of Celtic Christianity in Wales.
Westmorland Day takes place annually on 29 September.
It marks the date in 1397, when King Richard II created Ralph Neville the first Earl of Westmorland.
A poll at the Westmorland County Show (2013) chose this day.
Other options included: 30 January – birth of Lady Anne Clifford; 30 July – death of Thomas de Strickland; 1 October – battle of Tinghai; 21 October – death of Earl Ralph Neville; 18 December – battle of Clifton (perhaps the last battle on English soil).
Lincolnshire Day takes place annually on 1 October.
It commemorates the Lincolnshire Rising, which began at Louth on 1 October 1536.
The rebels were protesting against the English Reformation and the Dissolution of the Monasteries.
Northamptonshire Day takes place annually on 25 October, the feast of St Crispin.
St Crispin is the patron saint of shoemakers, cobblers and leather workers – an important industry in the county.
The vote that selected the county day included several other options: 5 January – death of Philippa of Lancaster (1430), queen of Denmark, Norway and Sweden; 26 February – radar first demonstrated in Upper Stowe; 31 May – death of Waltheof (1076), 1st Earl of Northampton and last of the Anglo-Saxon earls; 28 July – battle of Talavera (1809), battle honour of the Northamptonshire Regiment, which gained the nickname ‘The Heroes of Talavera’.