| July | Wales' Year of the French | |
| June | Celtic Galicia | |
| May | Speckled Bob | |
| April | Anjela Duval Centenary | |
| March | Bleun-Brug 1905-2005 | |
| February | Katie Bar the Door! | |
| January | The Star Of Gomer |
| December | Abbey Theatre Centennial | |
| November | The Sinn Fein Policy | |
| October | The Way to the Gaeltachd (In The Footsteps of Alasdair MacColla , Part Two) | |
| October | Oscar Wilde Sesquicentennial 1854-2004 | |
| September | The Literary Policeman | |
| August | The Manx Have Landed | |
| August | The Way to the Gaeltachd (In The Footsteps of Alasdair MacColla , Part One) | |
| July | Inbher Lochaidh (Alasdair MacColla, Part Sixteen) | |
| July | Owain Glyn Dwr Sexcentenary 1404-2004 | |
| June | Georges Kadoudal Bicentennial | |
| June | Bloomsday Centennial 1904-2004 | |
| May | The First Welsh Opera | |
| May | Fear Thollaidh Nan Tighean (Alasdair MacColla, Part Fifteen) | |
| April | Divide and Conquer (Alasdair MacColla, Part Fourteen) | |
| April | The Irish Grandma Moses | |
| March | Dr. Barham and the Miners | |
| March | Aberdeen (Alasdair MacColla, Part Thirteen) | |
| February | United Opposition! (Alasdair MacColla, Part Twelve) | |
| February | Bicentennial of Trevithick’s Locomotive | |
| January | George Washington’s Breton General | |
| January | Montrose (Alasdair MacColla, Part Eleven) |
| December | The Scottish Campaign Begins (Alasdair MacColla, Part Ten) | |
| December | Balloon Tytler | |
| November | The Irishman Who Invented Dracula | |
| October | The Emerging Campaign (Alasdair MacColla, Part Nine) | |
| September | Another Turn of Fate (Alasdair MacColla, Part Eight) | |
| September | Cornish Gorsedd Diamond Jubilee | |
| August | The Battle of Shrewsbury (Owain Glyn Dwr Sexcentenary) | |
| August | A Turn of Fate (Alasdair MacColla, Part Seven) | |
| July | Spontaneous Combustion (Alasdair MacColla, Part Six) | |
| July | Robert Emmet Bicentennial | |
| June | Setting the Stage for War (Alasdair MacColla, Part Five) | |
| May | The Clouds of War (Alasdair MacColla, Part Four) | |
| May | Lord Monboddo’s Orangutang | |
| April | Richard Trevithick, Cornish locomotive inventor | |
| April | Alasdair MacColla, Son of Coll | |
| March | Grace Gifford Plunkett, Irish Patriot | |
| March | Alasdair MacColla, Gaelic Warrior, Part Two | |
| February | Alasdair MacColla, Gaelic Warrior, Part One | |
| January | Darwin’s Welsh Co-discoveror |
| December | The Controversial Caradoc Evans | |
| November | An Irish Suffragist | |
| October | The Life of Boswell | |
| September | The Flowers of the Forest | |
| August | You Foolish Galatians | |
| July | The Bard’s Son | |
| June | Owain’s Victory at Bryn Glas | |
| May | The Novelist of Mannin | |
| April | A Fateful Diplomatic Dinner | |
| March | Yann The Wise Duke of Brittany, 1402-2002 | |
| February | The United Scotsmen | |
| January | Battle of Le Mans (Franco-Prussian War) |
| December | Marconi Centennial 1901-2001 | |
| November | The Poet Who Planned The Easter Rising | |
| October | The Greatest Welsh Novelist | |
| September | The Other High King of Ireland | |
| August | To the Rear Stood Kilmarnock | |
| July | The Last of the Welsh Jacobites | |
| June | Fenians Invade Canada! | |
| May | The Feast of Bealtaine in Celtic History | |
| April | Owain Glyn Dwr Sexcentenary 1401-2001 | |
| March | The Concatenation of Celtic Titles | |
| February | The Fenian Ram — The First Modern Submarine | |
| January | The Discovery of Neptune |
| December | The Duchess in the Wooden Shoes | |
| November | Potato Riots on the Isle of Mann | |
| October | Battle of the Largs | |
| September | Owain Glyn Dwr Sexcentenary 1400-2000 |
The stories in This Month in Celtic History are drawn from the over 1000 anniversaries of people and events from the histories of the six Celtic nations of Ireland, Scotland, Wales, Brittany, Cornwall, and the Isle of Mann in the 2004 Celtic Calendar, available soon from the Celtic League American Branch.