I have composed a timeline of major events in Northbourne, more dates and information will be added as they are discovered.

Date
Northbourne Timeline
618
The manor of 'Norborne' was given by Eadbald, King of Kent (reigned 616-640) to the abbot and convent of St. Augustine in Canterbury.
1337
Salamon de Ripple, a monk of St. Augustine's monastery appointed by the abbot as 'keeper of this manor'. He made great improvements in particular he built new barns here, and a 'very fair chapel'.
1371
The great storehouses here belonging to the abbey, full of corn, were burnt down, the damage was estimated at one thousand pounds.
1450-1
Rebellion broke out in Kent and Sussex. The rebellion in the summer of 1450 was known as the 'Cade Rebellion', but there were other outbreaks in the Eastry area in early 1450 and again in 1451: John Tayllour of Finglesham who together with other unknown traitors, assembled at Eastry April 21st and 22nd, 1451 and "imagined and compassed the death of the king and the destruction of the realm."
1511
Archbishop Warham'sVisitation, 1511-12, NORBORNE: 'Item that there be many of the parisshe that wille not helpe to the clerks wages nor putt theire helpe to othrer charges'.
1557
Archdeacon Harpsfield's Visitation, NORBORNE: 'Memorandum that the vicaryg house ys brent [burnt]'.
1561
Edwin Sandys, (later Sir Edwin Sandys) born 9th December, Worcestershire.
1561
Queen Elizabeth I granted Northbourne Court for life to Edward Sanders, her foster brother. He resided here until he died (c.1580).
1573
Archbishop Matthew Parker's Visitation, NORBORNE: '... chauncell is in decay, the windowes are broken and Lacketh glasinge, and the chauncell Lacketh pavinge and whitinge,...'
1605
Sir Edwin Sandys married his fourth wife Katherine (sometimes recorded as Catherine). In the next two decades they had twelve children.
1605
June - Edwin Sandys published A Relation of the State of Religion .
1609
December - Sir Edwin Sandys denounced the vicar of Northbourne, Henoch Clapham.
1611
The first recorded letter by Sir Edwin Sandys  from 'Northborn' is dated March 1611.
1613/14
The formal grant of the Northbourne Court made in March 1613/14.
1614
Sir Edwin Sandys began to build a new mansion at Northbourne Court. Completed in 1616.
1614
Sir Edwin Sandys became a member of the East India Company.
1619
Governor Francis Yeardley was directed by Sir Edwin Sandys to issue writs for the election of a general assembly, and July 30, 1619, the first house of burgesses, and the first representative legislature body ever assembled in America met in the church at Jamestown.
1620/21
January - Sir Edwin Sandys, MP for Sandwich, Kent. 1621, 1624.
1621
16th June - Sir Edwin Sandys imprisoned in The Tower by the king, but he was released a month later on the 16th July.
1623
May 13th - Privy Council confined Sir Edwin Sandys to his house at Northbourne.
1629
October - Sir Edwin Sandys died and buried at Northbourne under an impressive monument.
1640
Sir Edwin Sandys's last wife, Katherine, dies.
1642
August - The Parliamentarian, Colonel Edwin Sandys, along with 200 troopers and 300 dragoons search Kent for weapons and purloin whatever they could find for the Parliamentary cause. He had a full commission to disarm all malignants, secure all forts, castles, and stores or arms.
1642
September 23  - The Parliamentarian, Colonel Edwin Sandys, was mortally wounded at the the Battle of Powick Bridge near Worcester. He died on 1 December and is buried at Worcester Cathedral.
1711
Matthew Bagley cast the five bells for St. Augustine's church Northbourne.
1740
Vice-Admiral Salmon Morrice (1672-1740) buried at Betteshanger church.
1775
The Kentish antiquary the Reverend Bryan Faussett (1720-1776) acquired two stone corbels from Northbourne Court.
1782
The scholar, translator, poet, and 'bluestocking,' Mrs. Elizabeth Carter (1717-1806) of Deal, was a keen walker and undertook 'many a ramble' to Northbourne Court; which she records in letters written in 1767 and 1770 and also in a letter to Mrs. Vesey, written on Aug. 19, 1782.
1806
Rev. Montagu Pennington (1762-1849), vicar of Northbourne 1806-49, published the  memoirs of Mrs. Elizabeth Carter and later her collected letters (see 1782).
1822
July - Collection made in the Parish of Northbourne (in consequence of the King's Letter) for the Relief of the poor in Ireland, who were perishing for want of food - £13 - 4s raised.
1825
Frederick E. Morrice (1778-1858) builds a new house at Betteshanger. A neo-Tudor villa designed by the architect Robert Lugar (1772/3-1855).
1850
Sir Walter James (later Lord Northbourne, 1st Baron) bought Betteshanger Park estate from Frederick E. Morrice.
1853-4
Sir Walter James had Anthony Salvin completely rebuild St. Mary's church at Betteshanger in the Norman style, imitating the 12th century church at Barfreston.
c.1856
Sir Walter James employed architect George Devey (1820 - 1886) to undertake major additions and remodelling of Betteshanger house.
1868
 June 2nd - Laying of the foundation-stone of the Wesleyan Chapel, Finglesham.
1881
Frederick L. H. Morrice of the Vine Northbourne published a book - 'The Nightless North - A Walk Across Lapland.'
1881
On 26th/27th November 1881, gales strong enough to be called hurricanes toppled at least 500 trees in Betteshanger Park,  and at the nearby vicarage "a valuable conservatory belonging to the Rev. John Worthington Bliss was almost totally destroyed."
1887
Mr. Gladstone's visit to Betteshanger. Reported in the Dover Standard 31 Dec 1887.
1893
Lord Northbourne, 1st Baron (Walter Charles James, 1816-1893), died 4th February 1893, at the age of 77. Buried in Betteshanger churchyard.
1898
December 9th - Mr. and Mrs. Jolliffe retire from the posts of Master and Mistress of Northbourne School, after 38 years service. Mr. Samuel Jolliffe 1838 - 1918.
1907
May 23rd - Northbourne schoolhouse and school were struck by lightning.
1914
In the autumn of 1914, the poet Rupert Brooke was stationed at Betteshanger with the Royal Naval Division.
1915
On 28th January, the formation of the Northbourne Platoon of the Volunteer Training Corps (WWI Dad's Army).
1915
In July 1915  a 'whirlwind' blew off two sweeps from the New Mill and it continued working with the remaining pair.
1925
Two of the four sails of the Old Mill were damaged and the mill went out of use; until 1928 when it was reconditioned.
1928-9
Excavation of Finglesham Anglo-Saxon cemetery (38 graves) by W.P.D Stebbing, see also 1959-67.
1935
The lych gate at St Augustine's church Northbourne was blown down in early 1935 and it was reported on 16 March that Betteshanger Colliery engineers had volunteered to repair the uprights and put it back up.
1939
Betteshanger Summer School and Conference on Bio-Dynamic Farming, held at Home Farm, 1-9 July 1939.
1940
In May 1940 Lord Northbourne (Walter Ernest Christopher James 4th Baron 1896-1982) published Look to the Land, the work that introduced the term ‘organic farming’.
1940
Sunday 25th August - Spitfire 1 K9931 of No. 610 Sqn crashed at Stoneheap Farm, Northbourne; P/O F.T. Gardiner baled out slightly wounded.
1940
Thursday 19th September 21.00, an unexploded bomb blocked the road from Worth to Ham.
1940
Friday 27th September - 15.50hrs: Bf109E-1 3442 12+ - of 4/JG52 severely damaged, and pilot wounded by S/L G.L. Denholm (or P/O R. Barry) of No. 603 Sqn over Thanet. It crashed through high-tension cables and force-landed in Northbourne Park. Gefr Ernst Bosch wounded.
1940
Wednesday 27th November - 0.8.30hrs: Spitfire 11A P7499 LZ-S of 421 Flt crashed at Cottington Court Farm, Finglesham, after attack by Bf109; P/O Keith A. Lawrence was blown out of the cockpit, but was picked up by RN vessel and taken to Ramsgate.
1944
Wednesday 8 November - 20.24hrs: A V1 fell near Northbourne school after skimming over the Downs.
1959-1967
Further excavation of Finglesham Anglo-Saxon cemetery by Sonia Chadwick (later Sonia Chadwick Hawkes) see also 1928-9.
1952
20 August 1952 - USAF Thunderjet 49-2349 call sign ‘Thread Red 2’ caught fire during a local night flying exercise. The pilot ejected and it crashed at Little Mongeham. He parachuted down to Ripple and afterwards was taken to Deal police station before returning to Manston. Curiously there is no mention of the pilot’s name although, in early 1951 it was flown by WWII veteran Col Eugene H. Snavely.
1982
July - White Horse at Finglesham burnt down.
2008
June/July - Lych gate roof repaired and new weather vane installed on top of the church tower.