The perpetual calendar
in [Math]
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From: Robert Bannister on 19 Feb 2010 19:07 Andrew Usher wrote: > Owing to the inconveniences which attend the shifting of the calendar, > and attempting in passing to create a more perfect Church calendar, I > say the following: > > 1. That Christmas day should be fixed to a Sunday, and this should be > the Sunday between Dec. 21 and 27, and that in all civilised countries > the Monday should be considered a holiday, or the Saturday if not > normally. > > 2. That similarly Easter day should be fixed to the Sunday which is 15 > weeks following Christmas. > > 3. That the leap year rule be changed to have a leap year occur every > fourth save that it be delayed when the leap year would start on a > Thursday, and that this gives 7 leap years in every 29, which is near > enough. > > 4. That the perpetual calendar can be made, by considering the first > day of the year of weeks to occur on the Sunday after the Assumption, > and if this is the first possible calendar day, it is called week 1, > and otherwise week 2, and every year runs through week 53. And this > calendar ensures that everything can be fixed to a day of a certain > week, in particular the American Thanksgiving must be made 31 days > before Christmas. > > 6. This is surely the best possible arrangement that can be made, > without disturbing the cycle of weeks or that of calendar days > inherited from the Romans. If you are going to try to make it sensible, then please give us 13 four-week months with one or two specially named days at the end of the year to even it out. The first day of each month should be a Monday. -- Rob Bannister
From: Andrew Usher on 19 Feb 2010 19:12 On Feb 19, 6:07 pm, Robert Bannister <robb...(a)bigpond.com> wrote: > > 6. This is surely the best possible arrangement that can be made, > > without disturbing the cycle of weeks or that of calendar days > > inherited from the Romans. > > If you are going to try to make it sensible, then please give us 13 > four-week months with one or two specially named days at the end of the > year to even it out. The first day of each month should be a Monday. Once again, I said that I excluded having days outside the week. And the first day of the week is Sunday, not Monday - that is an incontrovertible fact. Having 13 months, in addition, would screw up a bunch of things ; in particular, 13 can't be divided. Andrew Usher
From: Andrew Usher on 19 Feb 2010 19:15 On Feb 19, 1:38 pm, António Marques <antonio...(a)sapo.pt> wrote: > Easter is the central feast of Christianity, would be an end in itself if > nothing else, and of which all the particulars have the highest religious > significance. (Regardless of whatever pagan festivals coincide with it in > date or outward meaning.) I agree, but how does that mean we must celebrate Easter at the full moon? (which the Orthodox don't, anyway) Andrew Usher
From: Robert Bannister on 19 Feb 2010 19:15 Cheryl wrote: > Andrew Usher wrote: >> On Feb 19, 3:07 pm, Ant�nio Marques <antonio...(a)sapo.pt> wrote: >> >>>>> The reason I fix Christmas to a Sunday has been my observation that >>>>> arranging a family Christmas is substantially more convenient when it >>>>> falls on a weekend than in the middle of the week. Given that >>>>> Christmas >>>>> is the most important holiday in the year, should we not all get at >>>>> least a 3-day weekend, which we have for lesser holidays? >>>> Less than around 30% of the world population cares about Christmas or >>>> Easter or think that "Christmas is the most important holiday in the >>>> year". >>> Well, but for those who don't it doesn't really matter one way or the >>> other >>> what day Christmas and Easter Sunday are, does it? So what relevance >>> do they >>> have for you to bring them along? Or was it just the desire to sound >>> clever? >> >> Right, and I figure that my calendar would be no worse than the >> present for those that don't. >> >> Indeed, I considered this problem purely as a logical one; as I've >> stated, I don't consider myself Christian, I adopted the Church >> calendar as a base only because it makes the problem more interesting. >> >> I didn't consider my calendar complete until I worked out my new leap >> year rule (Rule #3) - it not only ensures that both Christmas and >> Easter are within 7-day periods despite being a constant distance from >> each other and having leap day in between, it simultaneously causes >> there to be exactly 52 Sundays in every year if you take out Nov. 1 >> which is All Saints' day; this immediately allows te to draw up a >> permanent list of the Sundays in the year with their traditional >> Christian designations, and then follow the perpetual calendar. >> >> And I moved the start of the week numbering to August from Nov. 1 so >> that the academic year and the US football season would be on the >> fixed schedule, and I think there can be no objection to that. The >> holidays I consider are Christmas and Easter (and of course the Church >> festivals fixed to them, but hardly anyone cares anymore), and US >> Thanksgiving - but other civil holidays could easily be fixed to the >> same if they are now observed on a Monday, say, or otherwise not fixed >> to a particular date. >> >> Andrew Usher > > Which academic year are you considering? I can think of several > variations - K-12 vs universities and colleges, to begin with, and there > are even variations among the K-12 school years in different > jurisdictions - and even within the same one, in places where some > schools have a year-round schedule. > > I will confess to being totally indifferent to the US football schedule. > In fact, I couldn't tell you what it is now, except for a vague > impression that it occurs in the fall, or possibly winter. > And have you taken the southern hemisphere into consideration? Our scholastic year is quite different. -- Rob Bannister
From: Robert Bannister on 19 Feb 2010 19:17
Androcles wrote: > > "Cheryl" <cperkins(a)mun.ca> wrote in message > news:7u8gk9FirvU1(a)mid.individual.net... >> Andrew Usher wrote: >>> On Feb 19, 3:07 pm, Ant�nio Marques <antonio...(a)sapo.pt> wrote: >>> >>>>>> The reason I fix Christmas to a Sunday has been my observation that >>>>>> arranging a family Christmas is substantially more convenient when it >>>>>> falls on a weekend than in the middle of the week. Given that >>>>>> Christmas >>>>>> is the most important holiday in the year, should we not all get at >>>>>> least a 3-day weekend, which we have for lesser holidays? >>>>> Less than around 30% of the world population cares about Christmas or >>>>> Easter or think that "Christmas is the most important holiday in the >>>>> year". >>>> Well, but for those who don't it doesn't really matter one way or the >>>> other >>>> what day Christmas and Easter Sunday are, does it? So what relevance do >>>> they >>>> have for you to bring them along? Or was it just the desire to sound >>>> clever? >>> >>> Right, and I figure that my calendar would be no worse than the >>> present for those that don't. >>> >>> Indeed, I considered this problem purely as a logical one; as I've >>> stated, I don't consider myself Christian, I adopted the Church >>> calendar as a base only because it makes the problem more interesting. >>> >>> I didn't consider my calendar complete until I worked out my new leap >>> year rule (Rule #3) - it not only ensures that both Christmas and >>> Easter are within 7-day periods despite being a constant distance from >>> each other and having leap day in between, it simultaneously causes >>> there to be exactly 52 Sundays in every year if you take out Nov. 1 >>> which is All Saints' day; this immediately allows te to draw up a >>> permanent list of the Sundays in the year with their traditional >>> Christian designations, and then follow the perpetual calendar. >>> >>> And I moved the start of the week numbering to August from Nov. 1 so >>> that the academic year and the US football season would be on the >>> fixed schedule, and I think there can be no objection to that. The >>> holidays I consider are Christmas and Easter (and of course the Church >>> festivals fixed to them, but hardly anyone cares anymore), and US >>> Thanksgiving - but other civil holidays could easily be fixed to the >>> same if they are now observed on a Monday, say, or otherwise not fixed >>> to a particular date. >>> >>> Andrew Usher >> >> Which academic year are you considering? I can think of several >> variations - K-12 vs universities and colleges, to begin with, and there >> are even variations among the K-12 school years in different >> jurisdictions - and even within the same one, in places where some >> schools >> have a year-round schedule. >> >> I will confess to being totally indifferent to the US football schedule. >> In fact, I couldn't tell you what it is now, except for a vague >> impression >> that it occurs in the fall, or possibly winter. >> >> -- >> Cheryl > > The USA doesn't have a football schedule. The rest of the world plays > football, the USA calls that soccer and then plays it's own version of > parochial handball. > 'Scuse me, what's rubbish about the rest of world playing that scoreless drama with a round ball? Footballs may be different sizes and weights and even the shape varies a bit, but they are basically ovoid. The other game is for kids in the street. -- Rob Bannister |