How come there's only 31 Days in a month? How did that ever come to be???
597080
To begin with it was a lunar calendar containing ten months, starting at the vernal equinox, traditionally invented by Romulus, the founder of Rome about 753 BC. However it seems to have been based on the Greek lunar calendar. The months at this time were\n\nMartius (31 days) \nAprilis (30 days) \nMaius (31 days) \nIunius (30 days) \nQuintilis (31 days) \nSextilis (30 days) \nSeptember (30 days) \nOctober (31 days) \nNovember (30 days) and \nDecember (30 days) \nThus the calendar year lasted 304 days and there were about 61 days of winter that did not fall within the calendar.\n\nThe first reform of the calendar was attributed to Numa Pompilius, the second of the seven traditional Kings of Rome. He is said to have reduced the 30-day months to 29 days and to have added January (29 days) and February (28 days) to the end of the calendar around 713 BC, and thus brought the length of the calendar year up to 355 days:\n\nMartius (31 days) \nAprilis (29 days) \nMaius (31 days) \nIunius (29 days) \nQuintilis (31 days) \nSextilis (29 days) \nSeptember (29 days) \nOctober (31 days) \nNovember (29 days) \nDecember (29 days) \nIanuarius (29 days) \nFebruarius (28 days) \nIn order to keep the calendar year roughly aligned with the solar year, a leap month of 27 days, the Mensis Intercalaris, sometimes also known as Mercedonius or Mercedinus, was added from time to time at the end of February, which was shortened to 23 or 24 days. The resulting year was either 377 or 378 days long. The decision to insert the intercalary month, and its placement, was the responsibility of the pontifex maximus. On average, this happened roughly in alternate years.\n\nThe system of aligning the year through intercalary months broke down at least twice. The first time was during and after the Second Punic War. It led to the reform of the Lex Acilia in 191 BC. The details of this reform are unclear, but it appears to have successfully regulated intercalation for over a century. The second breakdown was in the middle of the first century BC. This breakdown may have been related to the increasingly chaotic and adversarial nature of Roman politics at the time. The position of pontifex maximus was not a full-time job; it was held by a member of the Roman elite, who would almost invariably be involved in the machinations of Roman politics. Because a Roman calendar year defined the term of office of elected Roman magistrates, a pontifex maximus would have reason to lengthen a year in which he or his allies were in power, or to not lengthen a year in which his political opponents held office. It was only after Julius Caesar, who had been pontifex maximus for some years, seized absolute power that the calendar was overhauled, with the result being the Julian calendar.
819146
As you know a year is a full rotation of earth around the sun and initially month was the full rotation of moon around earth. Sumerians created their first calendar using this information. The problem with this is that a full rotation of moon is 29.5 days then 12 months make just 354 days. This is shorter than a year. Therefore, a synchronization was needed. In order to be able to synchronize their calendar people added another 13th month in every three years. However a standardization could not be achieved, different people added the 13th month at different times. This created a lot of problems especially for trade and contracts. As a result of this experience people thought that something is bad about 13 and they changed their calendar in such a way that months are no longer equal to the full rotation of moon around earth. There are still some calendars with a month equal to the full rotation of moon. For example, "honey moon" is a saying from those old days, because it was the tradition that father of the bride provided a fermented honey drink to the groom for a full month after the marriage.
646176
30 days + 31 days = 61 days
803104
Whatever and why is not the point, the fact that they do is damned annoying. The most logical way is day month year because it's in the order of how it changes....easy!
247201
25.31 births...sorry but i dont know per month
182927
because it is not a monthly cycle.  it happens every 28-30 days and hence it will overlap a "monthly" period of time
267369
21 days if you do not miss a day
581178
For what I know, May used to be the third month of the year. January and February seem to have been added in Ancient Rome. This is the reason why September, October, November and December don't match their ethimologic begginings anymore (sept means seven, octo means eight, nove means nine, dece means ten). I hope this is what you were looking for!
388263
February! there are less days in February. ha ha ha
239998
for 30 days its : 43,200 minutes\nfor 31 days its : 44,640 minutes\nand for 28 days its : 40,320 minutes\nand for leap month (29 days) its: 41,760 minutes
62449
Why 12 Months?\n\n\nThe ancient man found that in a complete cycle of seasons there are twelve cycles of the moon, thus the cycle of seasons, now refered as YERA was mad of 12 months.\n\n365 Days Of A Year?\n\n\nAfter getting men more knowledgeable it was found that one complete cycle of seasons OR the year takes 365 days.\n\n\nAdvancement in observations and clculations suggested that one complete cycle is of 365.242 days, thus in order to kepp the seasons fall the same way on the fixed times it was deviced that one day may be add after four years in February.\n\n\nINTERESTIN\n\n\nThe exact measure of 365.242 days in a year with adjustment of one day every four year required another adjustment of one day at every hundred years. For that Feburary in the year 2000 was to be made of 30 days (one day of leap year and one day of leap century). Unfortunately computerisation in the 20th century could not get information of adding two days and thus we had to accept a clander for 2000 with loss of one day. It means now we have a disadvantage of one day in a complete cycle. This is go on increasing in future if not checked earlier. With this milliniums later June will fall in severe cold in the northen hamesphire.\n\n\nEquaual Days in a Month?\n\n\nThere had been different efforts on international level to depict a system in which every month starts the same day and every month has the same number of days but so far nothing could have been developed.
979227
Remember, our bodies are not machines that work exactly the same way every month.  No one is exactly perfectly every 28 days all the time - I have had a few times where I didn't have a period one month and I wasn't pregnant, then the next month there is was again.\nAnd sometimes 2 in one month (our bodies don't know how to read a calendar, so what is a month on paper isn't necessarily a month in our systems with hormones, stress, diet, and so many other things affecting everything about us.
1176246
29 - 30 - 31 depends from the month!
25134
The traditional Chinese calendar does not contain “weeks”. In ancient China government officials enjoyed a day off for every ten days. The week system was introduced into China, I guess, only in early last century along with the Gregorian calendar. According to the Chinese calendar, a year has 12 months and a month has 29 or 30 days. If a month has 29 days, we call it the lesser month; if 30 days – the greater month. Each of the 12 months of a certain year can be lesser or greater, depending on the astronomical calculation. There is no special name to each month; they are identified by the ordinal numbers (1 to 12). If you want to know, for example, whether the second month of the next Chinese year (or lunar year) is a lesser or greater one, you have to consult an almanac or a perpetual calendar. There is an intercalary month arranged for every three years (approximately). An intercalary year has 13 months. That’s the outline of the Chinese calendar. And it may be obvious that the Chinese calendar cannot match its dates to the week's days.
558487
It's not always exactly every 30 days.  It could be 33 or 35, especially at first.  Don't worry unless you think you're pregnant.  Talk to your mom about it or sister or older friend.
763017
February used to have 29 days and 30 - in leap years - before Augustus Caesar's ego messed it up.\n\nThe Roman year began in March and February was the 12th month. After June came Quintus (the 5th month) of 31 days and Sextus (the 6th month) of 30 days. Followed by September (the 7th month), Julius Caesar decided to name Quintus after himself and we now know of it as July. \n\nThen when Augustus Caesar became Emperor he decided he would change the name of Sextus and name it after himself. As that would mean his month has one day less than July and imply he was a lesser emperor than Julius Caesar had been, he decreed that August should have 31 days not 30 and he therefore lopped a day off February,\n\nSo your proposal merely seeks to restore us to the calendar as it was prior to Augustus Caesar's interference,\n\nThe Babylonians with their sexagesimal (base-60) counting system which gave the world 360 degrees in a circle, also had 360 days in a year and 12 months of 30 days, Unlike the French solution, they added their extra days in the form of a 13th month, once every 6 years.\n\nThe French Republican calendar was a thorough overhaul of the system, introduced in the context of the world's first metric system, and involved not only 12 30-day months but 3 10-day weeks in a month, 10 hours in a day. 100 minutes in an hour and 100 seconds in a  minute. The months had new names, the year began in the autumn and Year 1 was the date of the Declaration of the French Republic\n\nClocks were built to tell the time by these rules but they did not catch on. Napoleon officially abandoned the calendar on 1st January 1806, after little more than 12 years of use. It briefly resurfaced and re-emerged again at the time of the Paris Commune in 1871, but it has not exactly attracted swarms of advocates before or since.\n\nMy conclusion is that people are set in their ways, see no great pressing need for change and that as there is no exact, mathematically neat solution to the fact that a year is not an exact number of days (nor is a lunar month either) whatever system we use will be a bit inelegant, and acknowledging that, most people would say "let's stick with what we have got. It's easier. Then we don't have to learn anything new."\n\nInertia, apathy and habit will all argue against change, I fear! However logical the change may be.
774148
Rotational Years\nIf you write the year using the digits , the year  was a special year because it read the same upside-down. How many years since the birth of Christ have had this property?\n \nYou are given the following information, but you may prefer to do some research for yourself.\n1 Jan 1900 was a Monday.\nThirty days has September,\nApril, June and November.\nAll the rest have thirty-one,\nSaving February alone,\nWhich has twenty-eight, rain or shine.\nAnd on leap years, twenty-nine.\nA leap year occurs on any year evenly divisible by 4, but not on a century unless it is divisible by 400.\n\nHow many Sundays fell on the first of the month during the twentieth century (1 Jan 1901 to 31 Dec 2000)?