It's marked with the loyal toast to Her Maj, The Queen, Duke of Lancaster, with town criers across the old county palatine reading the Lancashire Day proclamation.
Blackpool's own town crier Barry McQueen was selected by the Friends of Real Lancashire to launch the occasion here in Blackpool, reading the proclamation from the top of Blackpool Tower.
If you missed out on that, here's how it goes....
"To the people of the City and County Palatine of Lancaster: greetings! Know ye that this day, November 27th in the year of our Lord, 2009, the 58th year of the reign of Her Majesty Queen Elizabeth II, Duke of Lancaster, is Lancashire Day.
"Know ye also, and rejoice, that by virtue of Her Majesty's County Palatine of Lancaster, the citizens of the Hundreds of Lonsdale, North and South of the Sands, Amounderness, Leyland, Blackburn, Salford and West Derby are forever entitled to style themselves Lancastrians.
"Throughout the County Palatine, from the Furness Fells to the River Mersey, from the Irish Sea to the Pennines, this day shall ever mark the people's pleasure in that excellent distinction– true Lancastrians, proud of the Red Rose and loyal to our Sovereign Duke.
"God bless Lancashire and God save the Queen, Duke of Lancaster!"
Barry's done his bit today at Thornton, reading the proclamation again at the Little
Theatre, after telling local youngsters, at Thornton Cleveleys Library about his role and the history of the original palatine county back in the day when it included the likes of Liverpool and Wigan.
Tonight he's off to the Royal Oak, Littleborough, to help host a night of hot pot and
merriment.
But Blackpool's topped the lot. He explains: "There's been a lot of focus on Blackpool with the forthcoming Royal Variety Show – it was fantastic to launch it here."
There's no shortage of other events tonight, locally, but among those that stand out are a Friends of Fleetwood Museum hot pot supper on the heritage trawler Jacinta, and a Lancashire night at the Hole in One, Forest Drive, Lytham, which includes free hot pot, folk band Penny Black, Singleton Cloggers, quiz, fancy dress and a loyal address to the black pudding.
But what really defines Lancashire? Ask former Lancashire High Sheriff Jimmy Armfield, OBE, Deputy Lieutenant, for whom red rose county means: football and comedy.
He adds: "I did 200 engagements the year I was High Sheriff."
Tonight, as chairman, he's involved in a Lancashire Partnership Against Crime charity do, with fellow footie icons Sir Bobby Charlton and Roger Hunt.
Jimmy was born in Denton, Manchester, then a Lancashire border town, and that shaped his attitude, too.
"We felt very strongly that we were Lancastrians. The minute you crossed into Hyde, it became Cheshire. It was very them and us.
"The old county borders mean a lot to people, even if Lancashire Day doesn't. Wigan and Bolton were both archetypal Lancashire towns for people of my generation who
remember the cotton and coal days. Barrow's another Lancashire town.
"For me, Lancashire means football. It's the home of football, the Football League founded here, all the initial towns involved in this county. It also means comedy. Great comedians have come from Lancashire proper, look at the breadth of humour Arthur Askey, George Formby and Peter Kay represent.
"For many High Sheriffs the highlight of their year was the shield-hanging ceremony in Lancaster. Not me. I loved meeting people, the real Lancastrians, young and old.
"What struck me most strongly was their sense of humour. Most Lancastrians have a very good sense of humour. They know how to laugh at themselves."
If that doesn't give you a flavour of what it is to be a Lancastrian, visit Blackpool's Kwizeen restaurant, on King Street, tonight.
The Lancashire night four-course dinner features themed goodies, lamb hot pot and crispy Bury black pudding, among them, and guest speaker Ian Coggin, award-winning cheese producer from Dewlay Farm in Garstang.
Chef-owner Marco Calle Calatayud's family came from Barcelona but he rates Lancashire food as second to none.
"I see no point in running a local restaurant and not using local food," he admits. "Food is part of your identity."
He's particularly pleased with his latest creation, a Lancashire hot pot pie. "I've been experimenting with pies for six months and this is wonderful, lamb, potatoes, red cabbage, Bury black pudding in rosemary pastry. I've always been anti signature dishes but this is the one!"
Who can top a hot pot? Bernard Thresher, of the Lancashire Hotpots, the Spinal Tap of folk bands, according to another Blackpool favourite, comedian Paddy McGuinness, is out to out-sell Sir Cliff with the band's parody "It's Cliff-Mas Time", from their new Christmas Cracker album which also features such delights as chippy teas.
He adds: "Lancashire is the friendliest county around. It's like Corrie versus EastEnders. No contest. Blackpool's one of the best. We played there with Paddy in the massive Winter Gardens and we've appeared at North Pier too with our Ooh Me Knees tour.
"The worst thing about Lancashire? It's always raining. The worst thing about Blackpool is the wind - if I lose any more of me flat caps there, me mum will kill me.
"But Blackpool has the best chip butties. I live in Coventry where they are called chip batches. No wonder I get homesick...."

jacqui.morley@blackpoolgazette.co.uk