In British and Irish tradition, the quarter days were the four dates in each year on which servants were hired, and rents were due. They fell on four religious festivals roughly three months apart and close to the two solstices and two equinoxes.

The significance of quarter days is now limited, although leasehold payments and rents for business premises in England are often still due on the old English quarter days.

The quarter days have been observed at least since the Middle Ages, and they ensured that debts and unresolved lawsuits were not allowed to linger on. Accounts had to be settled, a reckoning had to be made and publicly recorded on the quarter days.

The English quarter days (also observed in Wales and the Channel Islands) are:

Lady Day was also the first day of the year in British dominions (excluding Scotland) until 1752 (when it was harmonised with the Scottish practice of 1 January being New Year's Day). The British tax year still starts on 'Old' Lady Day (6 April under the Gregorian calendar corresponded to 25 March under the Julian calendar). The dates of the Quarter Days observed in northern England until the 18th century were the same as those in Scotland.

Robert W. Paul (3 October 1869 – 28 March 1943) was a British electrician, scientific instrument maker and early pioneer of British film.

He was born in Highbury, London, and began his technical career learning instrument-making skills at the Elliott Brothers, a firm of London instrument makers founded in 1804, followed by the Bell Telephone Company in Antwerp. In 1891, he established an instrument-making company, Robert W. Paul Instrument Company, initially with a workshop at 44 Hatton Garden, London, later his office.

In 1894, he was approached by two Greek businessmen who wanted him to make copies of an Edison Kinetoscope that they had purchased. He at first refused, then found to his amazement that Edison had not patented the invention in Britain. Subsequently, Paul himself would go on to purchase a Kinetoscope, intent on taking it apart and re-creating an English-based version. He manufactured a number of these, one of which was supplied to Georges Méliès.

However, the only films available were 'bootleg' copies of those produced for the Edison machines. As Edison had patented his camera (the details of which were a closely guarded secret), Paul resolved to solve this bottleneck by creating his own camera. He was introduced to Birt Acres, a photographic expert, who had invented a device to move film as part of the developing process. Paul thought that Acre's principle could be used in a camera. This camera, dubbed the Paul-Acres Camera, invented in March 1895, would be the first camera made in England.