| 1848 | The events at Hydesville that led to the formation of Modern Spiritualism. |
| 1849 | Margaretta Fox gave the first public demonstration of mediumship in the Corinthian Hall, New York, USA. |
| 1852 | Mrs Hayden came from America and became the first Spiritualist medium to demonstrate mediumship in Great Britain. |
| 1853 | The first Spiritualist church opened in 1853 in Keighley in Yorkshire. |
| 1865 | Emma Hardinge, returned to England where she gave addresses on the Philosophy of Modern Spiritualism and was recognised as a gifted medium. |
| 1871 | Sir William Crookes reported on Spiritualism to the Royal Society and published his findings in the 'Journal of Science'. |
| 1890 | The first national conference of Spiritualists was held in Manchester. |
| 1901 | Signing of the Memorandum of Association of the Spiritualists' National Union Ltd, 18th October. |
| 1916 | Parliamentary campaign began for the legal recognition of Spiritualism, instituted by the Union under Ernest Oaten. |
| 1918 | Sir Arthur Conan Doyle proclaims his
belief in Spiritualism. |
| 1924 | Hannen Swaffer proclaims his belief in Spiritualism. |
| 1931-5 | Publication of J. Arthur Findlay's trilogy: On the Edge of the Etheric, The Rock of Truth, The Unfolding Universe. |
| 1932 | Psychic News founded by Arthur Findlay under the editorship of Maurice Barbanell. |
| 1934 | First broadcast on behalf of Spiritualism through BBC by Ernest Oaten. |
| 1937 | Spiritualism investigated by Church of England Committee set up by Archbishop of Canterbury, Dr. Lang. (Its favourable report was suppressed but leaked to Psychic News) |
| 1940 | Spiritualists' National Union granted Certificate to act as a trust corporation. |
| 1944 | Helen Duncan trial in London. |
| 1951 | Passing of Fraudulent Mediums Act removing genuine mediums from the provisions of the Witchcraft Act 1735 and the Vagrancy Act 1824, thereby enabling Spiritualists openly and legally to practise their religion. |
1964 1966 |
Stansted
Hall bequeathed to Spiritualists' National Union by Arthur
Findlay MBE to be used as a College.Arthur Findlay College, for the advancement of Psychic Science, opened in September. |
| 1990 | SNU Centenary. |
| 2008 | The Fraudulent Mediums Act was repealed. Consumer protection law was extended to protect people who pay for mediumship services. |