
On February 24th 1582 – Pope Gregory XIII published the papal bull Inter gravissimas. This announced amendments to the Julian Calendar created by Julius Caesar and created the Gregorian Calender. Caesar had realigned the Roman Calendar with the Solar Year, creating a ‘Year of Confusion’. The year was 445 days long but it resynced the days to their proper season.
The Julian Calendar
The Julian Calendar used leap years to align the Calendar Year with the Solar Year. But the earth does not cycle the Sun in 365.25 days. This is an overestimate of 1 day every century. So, since the time of Caesar, the year had got 10 days out of kilter. Gregory chopped those 10 days out of the Calendar. The 4th of October 1582, was to be followed by the 15th October 1582. This might seem simple, but imagine you are receiving your salary for October, and you find it 10 days short? Or you have a month to pay your debt and find it called in 10 days early? So the Pope ordered that these 10 missing days shouldn’t be used in calculating financial matters.
Computus
One of the main reasons for the reform was the ‘Computus’. This was the method of calculating Easter. Easter was a festival that followed the movements of the Moon but was synced into the Vernal Equinox. (The timing of Easter is the first full moon after the Vernal Equinox.). So the chopping of 10 days meant that the vernal equinox was set back to its proper place on March 21st. Arguments over the correct calculations of Easter had, in the 7th Century been a major stumbling block in uniting the Celtic Church in Britain with the Roman Catholic Church. (See my post on Easter here).
But this still left the drift caused by Caesar’s faulty leap year system. Gregory’s reforms stopped future drift by fine-tuning the leap years. From 1582 there would not be a leap year in those centurial years which were not divisible by 400. So 2000 was a leap year, but 2100 is not. This skips ‘three Julian leap days in every 400 years, giving an average year of 365.2425 mean solar days long.’ (Wikipedia). This keeps us aligned, although there is still a small error.
If you enjoy this sort of calendrical detail, you will love ‘The Calendar’ by David Ewing Duncan.
British Exceptionalism
Of course, Britain refused to join a Catholic innovation for nearly 200 years. But, religious prejudice at last gave way to reason, when we adopted the Gregorian Calendar in 1752. In the process, we lost 11 days, much to the horror of the London mob, who rioted against their loss.
Greece was the last European state to join in 1923. Japan joined in 1873, China in 1912, and Saudi Arabia in 2016. Ethiopia, Iran, Afghanistan, and Nepal keep distinct calendrical traditions. (see seasia.co for more details.) Strictly, we are using the Gregorian amendment to the Julian Calendar because it has all the elements of the Julian Calendar except a couple of adjustments.
See my post on the Julian Calendar here and my post on the year of confusion. For more on the Calendar (New Style) Act 1750 look here
Coltsfoot and Smoking

Coltsfoot is a daisy-like plant which is flowering about now. Gerard’s Herbal of 1633 suggests that the ‘fumes of the dried leaves taken through a funnel’ is good for those with coughs and shortness of breath. He suggests that it is smoked like tobacco and it ‘mightly prevaileth.’
This idea, Mrs Grieves says in her herbal (1931), is endorsed by ‘Dioscorides, Galen, Pliny, and Boyle’. And Coltsfoot is ‘nature’s best herb for the lungs’. (This is historic information re herbs and NOT current medical advice, as Coltsfoot can be very dangerous!).

My grandson and parents found a 19th Century pipe bowl, much like the one pictured here, by the Thames where there were many fragments of clay pipe. For more on 17th Century smoking, have a look here.
On This Day
In Rome February 24th was the day of the 4 yearly leap day. The way they did it was to have two days called February 24th! It was the sixth day before the Calendars (March 1). This practice gradually got replaced by adding a new day, February 29th, at the end of the Month. In England, February 29th starts appearing in the 15th Century. But Wikipedia tells me:
‘the proceedings of the House of Commons of England continued to use the old system until the middle of the sixteenth century. It was not until passage of the Calendar (New Style) Act 1750 that 29 February was formally recognised in British law.’
See my page on the Leap Year here.
1809 – The famous Drury Lane Theatre burnt to the ground.
It is said that the owner and playwright Richard Brinsley Sheridan replied to someone who was surprised to see him sitting quietly having a drink while his theatre burnt down: “A man may surely be allowed to take a glass of wine by his own fireside?” londonist.com
1832 – Cholera in London
‘The news of the Cholera being in London has been received abroad. According to the feelings of the different nations towards England, France, who wish to court us has ordered a quarantine in her ports of three days; Holland, who feels aggrieved by our conduct at the conference, one of 40 days. The fog so thick in London that the illuminations for the Queen’s Birthday were not visible. ‘
24th February 1832 Thomas Raikes, Diary 1832 (from ‘A London Year’ Compiled by Travis Elborough and Nick Bennison, 2013,
This was the second Cholera Pandemic, but the first to reach the UK. The second landed in Sunderland in October 1831. Cholera killed over 6,000 in London. It was called the Asiatic Cholera based on its origin. The Cholera came more virulently in subsequent decades. It was thought to be spread by a miasma in the air. But, John Snow proved it was caused by polluted water, but I will tell that story in another post.
I think the Conference mentioned above was the London Conference of May 1832, which aimed to establish a Kingdom of Greece with King. It was set up by Foreign Secretary Lord Palmerston without discussion with the Greeks and ended up giving them a Bavarian King. King Otto. Otto was forced from the throne in a revolution in 1862, and replaced by a Danish King, from whom Prince Philip, Duke of Edinburgh was descended.
1920 –The Conservative MP, Nancy Astor becomes the first woman to speak in the House of Commons. Constance Markievicz was the first woman elected as an MP in 1918, but she was a member of Siin Fein and did not take her seat.
First published in February 2024, republished in 2025, The Gregorian Calendar added in 2026, and On This Day also added. And Retitled too.



























