Research

Dates and the Calendar

1751 - The Nine Month Year and 1752 - the year they stole 11 days

Before 1751 the UK worked by the Julian calendar (25th March, Lady Day, to 24th March). By this time most of Europe, with the exception of Russia, had switched to the Gregorian calendar (1st January to 31st December).

 

In 1751 there was a nine month year from 25th March to 31st December. In addition by this time the Julian and Gregorian calendars were 11 days different so in the UK these days were omitted from September 1752; 2nd September was followed by the 14th.

1752 was therefore the first year using the Gregorian calendar in the UK. However, banks ignored the calendar change so the financial year to this day ends on 5th April (11 days after 25th March).

(Source: "Ancestral Trails: The Complete Guide to British Genealogy and Family History" by Mark D. Herber)

Regnal Years

Historic documents often quote the year as being the Xth year in the reign of the king or queen. This method of dating documents was used by Parliament right up to the 1960s. So if a document shows the date as 23 Sept 13 George III this would be 23 Sep 1773 as the 13th occurance of the 23 Sept in the reign of George III was in 1773.

The dates used in the table below are all new style dates. See calendar change for more information about old and new style dates.

Monarch Start End
William I 25 Dec 1066 09 Sep 1087
William II 26 Sep 1087 02 Aug 1100
Henry I 05 Aug 1100 01 Dec 1135
Stephen 22 Dec 1135 25 Oct 1154
Henry II 19 Dec 1154 06 Jul 1189
Richard I 03 Sep 1189 06 Apr 1199
John1 27 May 1199 1216  
Henry III 28 Oct 1216 16 Nov 1272
Edward I 20 Nov 1272 07 Jul 1307
Edward II 07/08 Jul 1307 20 Jan 1327
Edward III 24/25 Jan 1327 21 Jun 1377
Richard II 21/22 Jun 1377 29/30 Sep 1399
Henry IV 30 Sep 1399 20 Mar 1413
Henry V 20/21 Mar 1413 31 Aug 1422
Henry VI 31 Aug / 01 Sep 1422 04 Mar 1461
Edward IV 04 Mar 1461 02 Oct 1470
Henry VI 05 Oct 1470 11 Apr 1471
Edward IV 11 Apr 1471 09 Apr 1483
Edward V 09 Apr 1483 25 Jun 1483
Richard III 26 Jun 1483 22 Aug 1485
Henry VII 22 Aug 1485 21 Apr 1509
Henry VIII 21/22 Apr 1509 28 Jan 1547
Edward VI 28 Jan 1547 06 Jul 1553
Jane 06 Jul 1553 19 Jul 1553
Mary I 19 Jul 1553 24 Jul 1554
Philip & Mary I2 25 Jul 1554 17 Nov 1558
Elizabeth I 17 Nov 1558 24 Mar 1603
James I 24 Mar 1603 27 Mar 1625
Charles I 27 Mar 1625 30 Jan 1649
Oliver Cromwell, Lord Protector 16 Dec 1653 03 Sep 1658
Richard Cromwell, Lord Protector 03 Sep 1658 07 May 1659
Charles II3 30 Jan 1649 06 Feb 1685
James II 06 Feb 1685 11/23 Dec 1688
William III & Mary II4 13 Feb 1689 27 Dec 1694
William III4 27 Dec 1694 08 Mar 1702
Anne 08 Mar 1702 01 Aug 1714
George I 01 Aug 1714 11 Jul 1727
George II5 11 Jun 1727 25 Oct 1760
George III6 25 Oct 1760 29 Jan 1820
George IV 29 Jan 1820 26 Jun 1830
William IV 26 Jun 1830 20 Jun 1837
Victoria 20 Jun 1837 22 Jan 1901
Edward VII 22 Jan 1901 06 May 1910
George V 06 May 1910 20 Jan 1936
Edward VIII 20 Jan 1936 11 Dec 1936
George VI 11 Dec 1936 06 Feb 1952
Elizabeth II 06 Feb 1952 current  


Where more than one date is stated for an event this is because sources used quote differing dates.

1John's regnal years are complicated because early regnal dates were taken from the date the monarch was crowned not the date of accession. John was crowned on Ascension Day which is a movable feast. His subsequent regnal years were not taken from the date of Ascension Day in the year he was crowned but in the current year. Therefore the start date of each regnal year changed. This could cause some dates to appear twice in one regnal year and not at all in an adjoining year.

2add note about Philip and Mary regnal years

3Charles II was restored to the throne in May 1660 (sources quote 08th and 29th). His regnal years were allocated assuming he succeeded his father after his execution on 30 Jan 1649. During the Commonwealth Period (the Interregnum) the regnal system of dating was not used.

4 After Mary died William's regnal years were counted from their joint accession on 13 Feb 1689

5During the reign of George II in 1752 the calendar was changed from the Gregorian to the Julian Calendar. Therefore the first 25 years of George II would be recorded as expected e.g. 01 Dec 20 George II would be 01 Dec 1747. The 26th year of his reign ran from 11 Jun 1752 to 21 Jun 1753 (to adjust for the missing days in Sept 1752). The 27th year ran from 22 Jun 1753 to 21 Jun 1754.

6 The regnal years ignored the Regency period from 06 Feb 1811 to 29 Jan 1820