Thirteen Month Calendar and Quarters

[Brillig]

Thirteen month calendars are often assigned a disadvantage of not being divisible by 4 so making the year not easily divided into quarters. However, consider that if a year can be divided into quarters, why not also divide a month into quarters? And since a 13 month calendar has months that are usually (or always) 4 weeks long, they are easily divided into quarters. Yearly quarters are simply 3 months and one week long. The first quarter ends after the 1st quarter of the month. The second quarter ends after the second quarter of the month. The third quarter ends after the third quarter of the month, and the 4th quarter ends after the 4th quarter of the month. Everything lines up again at the end of the year.

Victor

[Irv Bromberg]

On 2012 Jan 25, at 11:54 , Victor Engel wrote:

Thirteen month calendars are often assigned a disadvantage of not being divisible by 4 so making the year not easily divided into quarters. However, consider that if a year can be divided into quarters, why not also divide a month into quarters? And since a 13 month calendar has months that are usually (or always) 4 weeks long, they are easily divided into quarters. Yearly quarters are simply 3 months and one week long. The first quarter ends after the 1st quarter of the month. The second quarter ends after the second quarter of the month. The third quarter ends after the third quarter of the month, and the 4th quarter ends after the 4th quarter of the month. Everything lines up again at the end of the year.

Nice.  Simple.

[dpatte]

 From what I have recently heard, this is my favourite idea so far:

13 months of 4 weeks, each quarter has 13 weeks. And a gregorian style
leap day approx every 4 years at the end of december. NON perpetual.

The month is close to a real lunar month
Each quarter is close to a real season
each year is close to a real year

Now, to perfect it, you ignore adding leap days for a few years until
the winter solstice aligns with new years day.  PERFECTO

I bet it would be accepted everywhere except the USA where most people
are too superstitious about the number 13. (Yes you could have Friday
the 13, in the 13th month!)




On 2012-01-25 11:54, Victor Engel wrote:

> Thirteen month calendars are often assigned a disadvantage of not
> being divisible by 4 so making the year not easily divided into
> quarters. However, consider that if a year can be divided into
> quarters, why not also divide a month into quarters? And since a 13
> month calendar has months that are usually (or always) 4 weeks long,
> they are easily divided into quarters. Yearly quarters are simply 3
> months and one week long. The first quarter ends after the 1st quarter
> of the month. The second quarter ends after the second quarter of the
> month. The third quarter ends after the third quarter of the month,
> and the 4th quarter ends after the 4th quarter of the month.
> Everything lines up again at the end of the year.
>
> Victor

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[dpatte]

Im not superstitious, so personally I'm not concerned about Friday the
13th. I'm more concerned about people using drugs to delay childbirth so
their children can get Saturday birthdays for life.

As I said, I'm against a perpetual calendar.



On 2012-01-25 16:33, Sonny Pondrom wrote:

> Let me be the first to tell you that if weeks start perpetually on
> Monday, there will be zero Friday the 13th.   Or a perpetual year
> could start on a Sunday, if it were a blank day.
>
> Sonny Pondrom
> sonny@...
> 2012-01-4-3
> "YYYY-MM-W-D"
>
>
> On Jan 25, 2012, at 3:01 PM, David Patte wrote:
>
> From what I have recently heard, this is my favourite idea so far:
>
> 13 months of 4 weeks, each quarter has 13 weeks. And a gregorian style
> leap day approx every 4 years at the end of december. NON perpetual.
>
> The month is close to a real lunar month
> Each quarter is close to a real season
> each year is close to a real year
>
> Now, to perfect it, you ignore adding leap days for a few years until
> the winter solstice aligns with new years day.  PERFECTO
>
> I bet it would be accepted everywhere except the USA where most people
> are too superstitious about the number 13. (Yes you could have Friday
> the 13, in the 13th month!)
>
>
>
>
> On 2012-01-25 11:54, Victor Engel wrote:
>> Thirteen month calendars are often assigned a disadvantage of not
>> being divisible by 4 so making the year not easily divided into
>> quarters. However, consider that if a year can be divided into
>> quarters, why not also divide a month into quarters? And since a 13
>> month calendar has months that are usually (or always) 4 weeks long,
>> they are easily divided into quarters. Yearly quarters are simply 3
>> months and one week long. The first quarter ends after the 1st
>> quarter of the month. The second quarter ends after the second
>> quarter of the month. The third quarter ends after the third quarter
>> of the month, and the 4th quarter ends after the 4th quarter of the
>> month. Everything lines up again at the end of the year.
>>
>> Victor
>
>

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