1 April: Gowk Day, the Scottish equivalent to April Fools' Day.
2 April 1820: The Radical Rising or Radical War gets under way in west central Scotland. Its ringleaders are later executed.
2 April 1831: The birth in Edinburgh of David MacGibbon, the architect and a partner in the practice of MacGibbon and Ross, best known today for their comprehensive multi-volume books about Scotland's castles and churches.
3 April 1603: King James VI of Scotland moves south to London to become James I of England. He promises to return every three years, but will return to Scotland just once in the 22 years until his death.
3 April 1910: The death in Australia of Catherine Helen Spence the leading author, teacher, journalist, and campaigner for women's rights.
4 April 1406: King Robert III dies in Rothesay Castle after hearing the news of his son James' capture by the English. James therefore succeeds to the throne as James I at the age of 12 and as a prisoner of Henry IV of England.
4 April 1617 : The death in Edinburgh of John Napier, the hugely influential mathematician who invented logarithms, who produced a calculating machine, and who did much to further the interests of the decimal point in mathematics.
4 April 1661: The death at Balgonie Castle in Fife of Alexander Leslie, 1st Earl of Leven, the professional soldier who became a field marshal in the Swedish army before returning to command the Scottish Covenanter army during the Wars of the Thee Kingdoms.
5 April 1820: The "Battle of Bonnymuir", a skirmish between Radical weavers and Government troops near Bonnybridge, sees the end of the Radical War or Scottish Insurrection.
5 April 1902: The collapse of a stand during a Scotland vs England football match at Ibrox Park in Glasgow kills 25 supporters and injures 517 more.
6 April 1320: The Declaration of Arbroath, drafted by Bernard, Abbot of Arbroath, is addressed to the Pope in an effort to have him recognise Robert the Bruce as King of Scotland (and remove the excommunication that followed his murder of the Red Comyn in a church). It defines the relationship between the Scottish King and the Scots people.
6 April 1998: The US Senate approves the celebration of an annual Tartan Day in recognition of the achievements of Scottish Americans.
7 April 1767: the birth in Torphichen in West Lothian of Henry Bell, who would make his name by building the the paddle steamer PS Comet and, in 1812, using it to run Europe's first commercially viable passenger steamboat service on the River Clyde.
7 April 1934: The Scottish National Party is founded as the result of a merger between the National Party of Scotland and the Scottish Party.
7 April 1968: Racing Driver Jim Clark is killed in a crash at the Hockenheimring racing circuit in Germany.
9 April 1139: The second Treaty of Durham is a concluded between King Stephen of England and King David I of Scotland. Under its terms Stephen recognises the independence of Scotland.
9 April 1747: Simon Fraser, 11th Lord Lovat, becomes the last person to be executed by beheading in Britain for his part in the 1745 Jacobite uprising.
9 April 1922: The death in London of Sir Patrick Manson, the founding father of tropical medicine.
11 April 1973: The death of Georgina MacKinnon, who served as chairwoman of Drambuie and did much to popularise the traditional MacKinnon liqueur worldwide.
12 April 1700: Scottish colonists finally abandon the failed settlement at Darien in Panama.
13 April 1719: A small Spanish force, believing itself to be part of a much larger invasion planned for England to return the Jacobites to power, lands in Loch Duich, east of the site of modern Kyle of Lochalsh.
13 April 1892: The birth in Brechin of Sir Robert Watson-Watt, generally regarded to be the "inventor of radar". While not the first to consider the possibilities in this area, he was the first to produce a workable system that turned the theory into a weapon critical to winning World War Two.
14 April 1578: James Hepburn, 4th Earl of Bothwell dies, insane, in Denmark's notorious Dragholm Prison.
16 April 1728: The birth in Bordeaux in France of Joseph Black, the eminent Scottish physicist and chemist, renowned teacher, and practicing medical doctor.
16 April 1953: The Royal Yacht Britannia is launched at John Brown's Clydebank shipyard.
17 April 1882: The "Battle of the Braes" takes place on the Isle of Skye over the crofters' refusal to pay their rents until the landowner returns traditional grazing rights. Attempts to serve eviction notices by 50 police are met with violent resistance.
17 April 1892: The death in Toronto of Scottish-born Alexander Mackenzie, the second Prime minister of Canada.
17 April 1895: The first cremation in Scotland takes place, at the Western Necropolis in Glasgow.
17 April 1932: The death in France of Sir Patrick Geddes, the noted biologist and botanist, and pioneer in the field of town planning.
17 April 1937: 149,415 fans attend the Scotland vs England football match at Hampden Park, Glasgow: a world record football crowd at the time and an enduring European record for an international match.
18 April 1939: The death of Ishbel Maria Hamilton-Gordon, Marchioness of Aberdeen and Temair and a strong supporter of women's rights.
19 April 1567: James Hepburn, 4th Earl of Bothwell, although already married, proposes marriage to Mary Queen of Scots with the support of many influential nobles across Scotland. Mary turns him down.
19 April 1824: The death in Greece of the leading poet of the Romantic movement and Greek liberation fighter George Byron, 6th Baron Byron.
20 April 1934: The first public meeting of the Scottish National Party is held at the Central Hall in Tollcross in Edinburgh.
21 April 1703: A "Company for the Quenching of Fire" is formed in Edinburgh, the ancestor of the modern fire service.
22 April 1838: The 703 ton paddle steamer SS Sirius, built in Leith, becomes the first ship to cross the Atlantic entirely powered by steam.
22 April 1869: The death of Patrick Bell, the Church of Scotland minister best remembered as the inventor of the reaping machine, the partial forerunner to today's combine harvester.
22 April 2005: The death in London of renowned artist and sculptor Sir Eduardo Paolozzi.
23 April 1661: Charles II is crowned King of England at Westminster Abbey: he had been crowned King of Scotland ten years earlier.
24 April 1558: Fifteen year old Mary Queen of Scots marries fourteen year old Francoise, Dauphin of France in Paris. The wedding is accompanied by an agreement that will unify the crowns of Scotland and France if there are children of the marriage, and hand over the crown of Scotland to France if there are not.
24 April 1633: A royal warrant is issued to Sir John Hepburn to raised a body of men in Scotland for service in France. This regiment becomes known as the Royal Scots.
27 April 1650: At the Battle of Carbisdale, near Bonar Bridge, James Graham, 1st Marquess of Montrose is defeated with heavy losses by a much smaller Covenanter force under Colonel Strachan. Montrose escapes north west until he is tricked into captivity at Ardveck Castle, on the shore of Loch Assynt.
27 April 1794: The death of James Bruce, who explored large parts of North Africa and Ethiopia and reached the source of the Blue Nile.
28 April 1928: The probably death in New York of Madeleine Smith, the daughter of a prosperous Glasgow family who in 1857 became the defendant in a notorious murder trial.
28 April 1988: The Prince and Princess of Wales open the Glasgow Garden Festival.
29 April 1863: Mary Livingstone, wife of explorer David Livingstone, dies in Africa of dysentery while accompanying her husband's Zambezi Expedition.
29 April 1977: British Aerospace takes over Scottish Aviation.
30 April 1728: The Royal Bank of Scotland agrees to the world's first overdraft when it allows the merchant William Hog to take £1,000 more from his account than he has in it (well over £60,000 in today's money).
30 April 1940: The French destroyer Maillé Brézé suffers an accidental explosion and sinks in the River Clyde off Greenock with the loss of 25 of her crew.