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why are 28 days in february

In Indiana, February brings on long and cold days. After surviving the cold temperatures and inclement weather of December and January, Hoosiers impatiently wait for March to welcome spring. And each year, the small amount of hope we have is that February won’t last too long. After all, it is two to three days shorter than every other month. This got us thinking, why does February only have 28 – and sometimes 29 – days anyway? Today, we answer that question with help from Slate and mental_floss.

February’s 28 days date back to the second king of Rome, Numa Pompilius. Before he became king, Rome’s lunar calendar was just 10 months long. It began in March and ended in December. At the time, Romulus, the first king of Rome, and his people found the time between December and March to be unimportant because it had nothing to do with the Harvest.

When Numa Pompilius took reign, he decided to make the calendar more accurate by lining it up with the year’s 12 lunar cycles. The new 355-day year needed two additional months to make up for the lost time. So he added January and February to the end of the calendar.

Because Romans believed even numbers to be unlucky, each month had an odd number of days, which alternated between 29 and 31. But, in order to reach 355 days, one month had to be an even number. February was chosen to be the unlucky month with 28 days. 

According to Slate, this choice may be due to the fact that Romans honored the dead and performed rites of purification in February. In fact, the word februare means “to purify” in the dialect of the ancient Sabine tribe.

After a few years of using the Numa Pompilius’ new 355-day calendar, the seasons and months began to fall out of sync. In an attempt to realign the two, the Romans added a 27-day leap month as needed. If Mercedonius was used, it began on February 24.

Because the leap month was inconsistent, this too had its obvious flaws. In 45 B.C., Julius Caesar commissioned an expert to create a sun-based calendar like the one the Egyptians used. The Julian Calendar added a little more than 10 days to each year, making each month either 30 or 31 days long, except for February. To account for the entire 365.25 day-long year, one day was added to February every four years, now known as a “leap year.” During most years, this left February with just 28 days.

According to mental_floss, to get Rome on track with the Julian Calendar, the year 46 BCE had to be 445 days long!

Why does February only have 28 days?

February was established as a 28-day month by the second king of Rome, Numa Pompilius.

Prior to this, the first king of Rome – Romulus – did not count the days of January and February in the year’s calendar as he felt they were unimportant because they didn’t produce any harvest.

When Pompilius took over, he decided to create a more in-sync calendar and added January and February in line with the 12 lunar months.

They were originally added to the end of the year – hence the Lunar Calendar beginning again at the end of February.

Almost every month had 29 or 31 days as even numbers were seen to be unlucky, however to add up to the original 355 days in one year there had to be an unlucky month – February.

The word februare means “to purify” in the dialect of the ancient Sabine tribe – February was the month used to honour the dead and perform ceremonies of purification.

Why was the year originally 355 days long?

The lunar cycle contains 364.3 days, but this was rounded to 355 so it wasn’t unlucky.

To try and regain the 0.75 of a day, every four years would be a leap of 27 days in February.

However, the alignment didn’t add up and the seasons began to fall out of sync with the months and days.

There were only 355 days of the year until the time of Julius Caesar, when he ordered a sun expert to create a calendar reflective of the sun’s cycle (solar) in 45 BC.

The Julian Calendar added a little more than 10 days to each year, making each month either 30 or 31 days long, except for February.

However, there was still the issue of a partial day left over, therefore every four years the days were rounded up to 29 – the reason for the leap year.

The Julian calendar is no longer called this, and is instead called the Georgian calendar.

Why do we use the Georgian calendar?

The Gregorian calendar was devised by Pope Pope Gregory XIII in 1582.

The only difference from the Julian in that no century year is a leap year unless it is exactly divisible by 400 – such as 1600, 2000.

This was because each century the calendar would fall out of alignment with the seasons and by the time the new calendar was devised the days were out of alignment by about 10 days.

Therefore, in the year of 1582, October 4 was succeeded by 15 October to regain the lost days and make the new calendar effec

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