| Year |
Event |
| 8000bc | Approximate date for the formation of the Haven waterway by flooding of the Daugleddau after the last ice age |
| 3000bc | Approximate date for the building of Pentre Ifan, Carreg Samson and Kings Quoit |
| 2100bc | Approximate date for Preseli Bluestones being taken from Pembrokeshire to Stonehenge |
| 500bc | Approximate date for many of Pembrokeshires Celtic Settlements |
| 300bc | Approximate date for the building of Castel Henllys hill fort |
| 850 | Viking Raids on Milford Haven start |
| 878 | The viking Hubba winters his fleet in Milford Haven |
| 1096 | Welsh seige of Pembroke Castle fails |
| 1100 | Approximate date for the building of a wooden castle at Cilgerran |
| 1100 | St Davids Church in Hubberston was founded during the 1100s. |
| 1108 | Arrival of the Flemish who founded Haverfordwest |
| 1115 | Norman Bishop installed at St Davids |
| 1120 | Building of Haverfordwest Castle |
| 1120 | Pope Callixtus II declares 2 pilgrimages to St Davids = 1 pilgrimage to Rome |
| 1136 | Benedictine Monastry established on Caldey Island |
| 1146 | Gerald of Wales born at Manorbier Castle |
| 1170 | Adam de Roche founded the Benedictine priory called Hubberston Priory, in Lower Priory, Milford Haven |
| 1180 | Dedication of the Thomas a Becket beacon chapel on the Rath, Milford Haven. (Fully restored in the 1930s) |
| 1180 | Start of building work on St Davids Cathedral |
| 1200 | Approximate date for the founding of Haverfordwest Priory |
| 1200 | Milford Haven area was referred to as Millfyth by historian George Owen during the 1200s |
| 1215 | Llewelyn set fire to much of Haverfordwest |
| 1223 | Cilgerran Castle captured by William Marshall (the Younger)(Earl of Pembroke) and rebuilt in its current layout |
| 1260 | Prince Llywelyn ransacked Tenby |
| 1280 | Start of building work for the current Carew Castle |
| 1348 | Black Death (The Plague strikes Hakin) |
| 1405 | French mercenaries arrive at Milford Haven to assist Owain Glyndwr they go on to set fire to Haverfordwest |
| 1457 | Henry Tudor born in Pembroke Castle |
| 1471 | Henry Tudor sets sail from Tenby - fleeing from the Yorkists |
| 1485 | Henry Tudor lands at Mill Bay (Dale) on the start of his campaign to retake the though. After defeating Richard III he became Henry VII |
| 1497 | Edward Prince of Wales grants the Charter to the town of Haverfordwest |
| 1543 | County of Haverfordwest granted the right to hold its own assize |
| 1545 | Haverfordwest allowed to have its own Member of Parliament |
| 1558 | William Nichol burned at the stake for his religion, Haverfordwest |
| 1625 | Hotel Mariners was established |
| 1638 | First meeting of the early Congregationalists at the Green Meeting House which later became Albany Church |
| 1642 | During the Civil War, the royalist Earl of Carberry attack on Pembroke fails when he findS the Parliamentry fleet in Milford Haven |
| 1644 | Battle of Colby Moor (between Wiston and Llawhaden) |
| 1648 | Pembroke Castle besieged by Cromwell |
| 1649 | Oliver Cromwell sets off for Ireland from Milford Haven |
| 1657 | George Fox, founder of the Society of Friends (also known as Quakers) came to Pembroke and Haverfordwest |
| 1659 | First Portfield Fair |
| 1661 | Quakers being imprisoned for their beliefs forced to leave for America. They go on to found the Amercan towns of Haverfordwest and Narberth |
| 1726 | Building of The Old Bridge in Haverfordwest |
| 1752 | All of Britain (except the Gwaun Valley near Fishguard) adopt the Gregorian Calender |
| 1761 | Haverfordwest granted its own Lord Lieutenant |
| 1763 | First of 14 visits by John Wesley to Haverfordwest |
| 1774 | Tabernacle Congregational Church established in Haverfordwest |
| 1782 | Sir William Hamilton inherited Hubberston and Pill |
| 1787 | Regular Mail Coach established linking Hubberston to London |
| 1789 | Original Bethesda Baptist Church built. |
| 1790 | Act of Parliament granted right to establish a port on land at Hubberston and Pill |
| 1790 | Founding of Milford Haven by Sir William Hamilton - On 9th June, an Act of Parliament was passed which gave rise to the founding of the port. |
| 1790 | Last of 14 visits to Haverfordwest by John Wesley |
| 1791 | Building of Haverfordwests Butter and Fish Market |
| 1791 | The Pill to Haverforwest Road is administered as a Turnpike Trust with a Toll Gate at Castle Terrace |
| 1792 | Greville persuaded Quaker Whalers from Nantucket to settle in Milford Haven. The Quakers had emigrated to America to escape religious persecution, hence they had experience of building new towns from scratch. |
| 1794 | Building of Foley House |
| 1796 | Navy Board starts building ships near Hubberston Pill. Ships built here include Milford, Lavinia and Nautilus |
| 1797 | A Customs Bonded Store was built on Milford Docks. This was later extended on both sides and is now the Museum |
| 1797 | The French invaded at Strumble Head. 1,400 French troups were defeated by the local women in less than 2 days! |
| 1797 | The Navy Board establish Milford Dockyard to build warships |
| 1797 | Whale Oil Warehouse built Milford Haven |
| 1799 | Opening of first gaol in Haverfordwest |
| 1800 | The New Inn was built in Hamilton Terrace, Milford Haven. (Now known as the Lord Nelson Hotel) |
| 1801 | Building starts on St Katherines Church in Milford Haven |
| 1802 | Nelson visits Milford Haven and declares it one of the finest harbours ever seen |
| 1802 | The New Inn in Milford Haven was renamed the Lord Nelson Hotel after Nelsons visit |
| 1804 | Founding of the Milford Artillery Company |
| 1806 | The extensions which form the sides of Milford Museum were built |
| 1808 | St Katherines Church, Milford Haven, completed |
| 1809 | Work Abandoned on the Greville Observatory Milford Haven (Part of the College of King George III) |
| 1810 | Many Quakers returned to America. Demand for Whale Oil was falling due to Gas Lamps replacing Whale Oil lamps in the cities. |
| 1811 | Opening of the Friends Meeting House in Milford Haven |
| 1814 | Pembroke Dock founded by Royal Navy who were concerned about overcharging at the port of Milford Haven |
| 1816 | Original Bethesda Baptist Church extended |
| 1817 | Ebeneezer Church built in Haverfordwest |
| 1821 | King George IV visits Milford Haven twice in 4 days!(each time taking refuge from a tempest) |
| 1821 | William Roblin was the last man to be hanged at Haverfordwest Castle |
| 1822 | Haverfordwests Gaol replaced by three story gaol which is now the records Office |
| 1824 | Founding of Haverfordwest Cricket Club (The Oldest cricket Club in Wales) |
| 1831 | Weslyan Chapel built in Milford Haven (Wesleyan Court now stands on the site) |
| 1835 | Building of Shire Hall |
| 1837 | Opening of the New Bridge in Haverfordwest (This was originally a toll bridge.) |
| 1839 | Opening of Haverfordwest Workhouse |
| 1839 | Start of the Rebecca Riots which centred on the area around Narberth |
| 1840 | Building of Scolton Manor |
| 1840 | Opening of Rehoboth Presbyterian Church in Milford Haven |
| 1848 | Old Bridge in Haverfordwest was widened |
| 1850 | Building of Perrots Terrace, Haverfordwest |
| 1853 | Arrival of the South Wales Railway |
| 1855 | Date on the Foundation Stone of Hubberston National Primary School |
| 1856 | Founding of Neyland - Brunel put a railway station here to slight Milford Haven. |
| 1857 | Hill Park Baptist Church built in Haverfordwest |
| 1857 | Police Station opened in Faulke Street, Milford Haven |
| 1858 | Opening of the wooden Castle Pill Bridge, known as Black Bridge because it was coated in protective tar. |
| 1859 | Building of Scoveston Fort |
| 1859 | Neyland acquires it current name. (Previously it was called Milford Haven) |
| 1859 | Opening of first Pembrokeshire hospital, The Pembrokeshire and Haverfordwest Infirmary in St. Thomas Green, Haverfordwest |
| 1859 | The stepping stones crossing the pill between Milford Haven and Hakin are replaced by a wooden toll bridge |
| 1860 | Start of building work at Hubberston Fort (some accounts putthis in 1858) |
| 1863 | Hubberston Fort completed for a cost of £87,000 |
| 1863 | The Railway arrives in Milford Haven |
| 1872 | St David & St Patrick Church built in Dew Street, Haverfordwest |
| 1874 | Formation of the Milford Haven Docks Company |
| 1874 | Original Pembrokeshire hospital replaced by new infirmary |
| 1875 | The steam ship Great Eastern comes to Milford Haven for a refit after laying Transatlantic Cables |
| 1876 | Creation of the Port Sanitary Authority (now known as the Milford Haven Port Authority) |
| 1877 | Opening of the North Road Board School in Milford Haven |
| 1879 | Opening of the Baptist Chapel in North road, Milford Haven |
| 1887 | Haverfordwest given the Mayoral Chain by George Leader Owen |
| 1887 | The book Little England Beyond Wales was published by Edward Laws |
| 1887 | Wooden Toll Bridge from Hakin to Milford Haven was replaced by an Iron Toll Bridge |
| 1888 | Flooding of Milford Docks (Project cost £1,500,000) |
| 1889 | Transatlantic Passenger Ship "City of Rome" arrives in Milford with Barnam Circus |
| 1891 | Milford Haven recognised as a Parish. Previously it was a suburb of Steynton Parish |
| 1894 | Formation of Milford Haven Urban District Council |
| 1896 | Formation of Haverfordwest Male Voice Choir |
| 1898 | Great Western Railway extended into Milford Haven Docks |
| 1899 | Formation of Haverfordwest County (Football) Club |
| 1902 | Opening of the Methodist Chapel in Priory Road, Milford Haven |
| 1904 | Waldo Williams (Welsh Poet) born in Haverfordwest |
| 1907 | Extension to St Katherines Church in Milford Haven |
| 1908 | Building of first Smoke House Milford Haven - to support the fishing industry |
| 1908 | GWR moves the Irish Ferry service from Neyland to Fishguard |
| 1909 | Opening of the Fire Station in Dartmouth Street, Milford Haven |
| 1909 | Tolls finally abolished on the bridge between Milford Haven and Hakin |
| 1910 | Opening of the Tabernacle in Charles Street, Milford Haven |
| 1914 | Arrival of the Belgium Fishermen Refugees in Milford Haven |
| 1918 | Haverfordwest was probably the first town to recieve news of the Armistice via the Transatlantic Cable |
| 1923 | Opening of the War Memorial Hospital |
| 1924 | Dedication of the War Memorial in Milford Haven |
| 1926 | Milford Haven electrified (The first town in Wales to be electrified) |
| 1928 | HMS Warrior laid up in the Haven (staying for 51 years) |
| 1930 | Construction of the Milford Haven sewage system |
| 1930 | Restoration of Thomas a Becket Chapel on the Rath begins |
| 1931 | Construction of Milford Haven Central School |
| 1931 | Hakin School becomes a junior school as older pupils go to Grammar or Central School |
| 1932 | Opening of Preseli Waterworks |
| 1933 | Iron bridge between Hakin and Milford Haven replaced by a concrete one. Convoy of 8 Steam Rollers cross in close formation to prove that a bridge made from concrete is safe |
| 1933 | Royal visit to Milford Haven |
| 1935 | Building work started on the Royal Naval Armament Depot. (Often called the Mine Depot) |
| 1936 | First Haven oil spill from the Banda Sharpur who was stranded on Dale Beach |
| 1936 | Post Ofice moved to Quay Street |
| 1939 | Milford Haven Fire Station moved to the Town Hall |
| 1939 | Opening of Milford Haven Mine Depot |
| 1939 | Outdoor Swimming Pool on The Rath opened |
| 1939 | Town Hall started service. (There has never been an opening ceremony) |
| 1940 | German Navy start dropping Mines in the Haven |
| 1943 | Opening of the RAF airport at Haverfordwest |
| 1944 | Seebees (American Naval Construction Unit) build temporary hospital near Hubberston Fort to accept the casualties expected during the D-day Landings |
| 1945 | Closing of the RAF airport at Haverfordwest |
| 1950 | Memorial Garden given to Milford Haven Urban District Council by the Welcome Home and Memoral Fund Committee |
| 1952 | Pembrokeshire Coast Path National Park created |
| 1957 | Construction works starts on the Esso Refinery in Milford Haven |
| 1958 | Founding of the Milford Haven Conservancy Board |
| 1959 | First Meeting of the Milford Haven Round Table |
| 1960 | Esso Portsmouth explodes while alongside the Esso jetty in Milford Haven |
| 1960 | Opening of Esso, the first Milford Haven Oil Refinery |
| 1960 | Opening of the BP Jetty |
| 1962 | First Annual Carnival organised by Milford Haven Round Table |
| 1964 | Official opening of Texaco Refinery by the Queen |
| 1964 | Opening of Milford Haven Grammar School in Steynton Road |
| 1966 | Armoural Bearings granted to Haverfordwest |
| 1966 | Milford Haven Fire Station moved to Yorke Street |
| 1966 | Opening of Texaco |
| 1967 | Torrey Canyon Oil Spill (Tanker was on route to Milford Haven) |
| 1968 | Building work started at Llys-y-fran Dam |
| 1968 | Opening of Gulf Oil Refinery |
| 1968 | Royal Family visit Milford Haven for Opening of Gulf Refinery |
| 1970 | Collapse of the Cleddau Bridge during construction |
| 1971 | Amoco Oil Refinery building started |
| 1972 | Founding of the Pembrokeshire Coast national Park |
| 1972 | Official Opening of Llys-y-fran Dam |
| 1973 | Amoco Oil Refinery (now Elf/Total/Murco) came on-line |
| 1973 | Calvary Pentecostal Church built in Portfield |
| 1973 | Opening of The Mead's Sports Centre with its Indoor Swimming Pool |
| 1974 | Formation of Preseli District Council |
| 1975 | Haven ferries replaced by the Cleddau Bridge |
| 1976 | Official Opening of the Cleddau Bridge |
| 1977 | Opening of the Torch Theatre |
| 1977 | The Astoria Cinema in Milford Haven becomes a bingo hall |
| 1978 | Cristos Bitos Oil Spill |
| 1978 | Filming of The Onedin Line television series in the Haven |
| 1979 | B&I Ferry "Cannacht" arrived in Pembroke Dock |
| 1979 | Opening of Withybush Hospital |
| 1979 | HMS Warrior departs the Haven (after 51 years) |
| 1983 | Amoco Oil Refinery Fire (involved 150 firemen!) |
| 1983 | Archeologic Excavation of Haverfordwest Priory |
| 1983 | Closure of the Esso Oil refinery |
| 1985 | Closure of BP Oil Facility |
| 1985 | Brunel Quay Marina in Neyland Opens |
| 1986 | Conservancy board became the Port Authority |
| 1987 | Outdoor Swimming Pool on The Rath closed |
| 1988 | Milford Haven Grammar School went Comprehensive and became Milford School |
| 1989 | A blue stone travelled to Stonehenge from the Preseli's. (This journey did not use authentic transport techniques.) |
| 1989 | Closure of the Royal Naval Armament Depot |
| 1990 | Approximate opening of the Thornton Business Park |
| 1990 | Milford Haven celebrated 200th anniversary with visit by Princess Alexandra |
| 1990 | Opening of the Water Gardens on The Rath by Margaret Thatcher |
| 1991 | Closure of the Milford Haven Royal Naval Armament Depot |
| 1991 | Construction of the new Fish Market on Milford Docks |
| 1991 | Opening of Milford Marina by the Duke of York |
| 1991 | The Tall Ships Race started at Milford Haven |
| 1992 | First Texaco Explosion - so serious they offered to buy houses in Rhoscrowther |
| 1992 | Unveiling of the Fisherman Tribute statue on the Rath |
| 1993 | Llys-y-fran dam rasied by 1.5m to ease national water shortage |
| 1994 | Gas Reserves discovered off-shore from Pembrokeshire |
| 1994 | Second explosion and major fire at Texaco Refinery - blast felt 30 miles away |
| 1996 | Sea Empress oil tanker - spills it cargo causing environmental disaster |
| 1997 | Opening of the Seal Hospital |
| 1998 | Fish market extended to 3 times its original size |
| 1998 | Gulf stopped refining oil and became the Petroplus facility |
| 1998 | Opening of the current bridge between Hakin and Milford Haven |
| 1999 | Opening of the Electronic Fish Auction on Milford Docks. |
| 1999 | Unveiling of the Statue of Brunel at Neyland by HRH Prince Charles |
| 2000 | Blockade of Elf and Texaco Refineries as Truck Drivers protest over rising fuel prices |
| 2000 | First DigitalDan web site, (dedicated to Milford Haven,) goes on-line |
| 2000 | Ill-fated journey of the second Millennium Blue Stone |
| 2000 | Opening of MITEC (Part of Pembrokeshire College based in Milford Docks) |
| 2001 | Opening of the Phoenix Bowl |
| 2002 | 3 Cruise Ships visit Milford Haven |
| 2002 | First Milford Haven Round Table Firework Spectacular detonated from the Sea Front |
| 2002 | Milford Haven Annual Carnival destination moved from Pill Field to Marble Hall |
| 2003 | First of the big Street Fairs takes over Hamilton Terrace, Milford Haven |
| 2003 | Milford Haven Annual Carnival Magazines replaced by Carnival Raffle Tickets |
| 2003 | Milford Haven Town Council web site goes on-line |
| 2003 | Permission granted for LPG gas facilities at Petroplus and Esso |
| 2004 | DigitalDan establishes its Haverfordwest website (www.Haverfordwest.info) |
| 2004 | LPG Regassification Plant construction work starts at South Hook and Waterston |
| 2006 | Major expansion to DigitalDan.co.uk Website to incorporate extensive photo library of the larger Pembrokeshire towns. |