On 2022-12-31 6:18 PM, JF Mezei wrote:
> Happy new year etc.
>
> Question: is there anything significant about the position of the earth
> around the sun on December 31 at 23:59:59 or January 1 at 00:00:00 ?
>
>
> I can understand the seasons aligned with solstices and equinozes which
> are specific times where the earth's orientation to the sun provides for
> equal day/night across most of planet. This is visible from within the
> earth. However, the position of earth around the sun isn't, unless I
> guess you are looking at stars.
>
> So if you notice repeating pattern of stars which repeats itself every
> 365.25 days, why choose december 31 as the end of the year? Is there
> something special about the stars at end of year that make it unique?
>

Hope this helps:
http://www.skip.net/DEC/ultimate-spr-leap-year-mark_crispin.html

January 1st marking the beginning of the new year has nothing to do with
seasons or the vernal equinox, as did prior denotation of the New Year
but since 153 BCE was the day the Roman consuls took office, by decree
of Julius Caesar.

We will never really know what might have become of the Gregorian
calendar had it not been for the unfortunate early demise of Regiomontanus.

Dave

On 2023-01-19 6:55 PM, David Spain wrote:
> On 2022-12-31 6:18 PM, JF Mezei wrote:
>> Happy new year etc.
>>
>> Question: is there anything significant about the position of the earth
>> around the sun on December 31 at 23:59:59 or January 1 at 00:00:00 ?
>>
>>
>> I can understand the seasons aligned with solstices and equinozes which
>> are specific times where the earth's orientation to the sun provides for
>> equal day/night across most of planet. This is visible from within the
>> earth. However, the position of earth around the sun isn't, unless I
>> guess you are looking at stars.
>>
>> So if you notice repeating pattern of stars which repeats itself every
>> 365.25 days, why choose december 31 as the end of the year? Is there
>> something special about the stars at end of year that make it unique?
>>
>
> Hope this helps:
> http://www.skip.net/DEC/ultimate-spr-leap-year-mark_crispin.html
>
> January 1st marking the beginning of the new year has nothing to do with
> seasons or the vernal equinox, as did prior denotation of the New Year
> but since 153 BCE was the day the Roman consuls took office, by decree
> of Julius Caesar.
>
> We will never really know what might have become of the Gregorian
> calendar had it not been for the unfortunate early demise of Regiomontanus.
>
> Dave
>
Well it might have been known as the Sixtus Calendar.

I would be remiss to fail to mention that the base Scholia for the 'DEC
SPR' (Software Problem Report) origination of the above link is real and
was authored by my good friend Stan Rabinowitz as later enhanced by Mark
Crispin. It came about when a VMS user submitted an SPR, if I remember
correctly sometime in the 1980s, claiming that the VAX/VMS Operating
System was incorrectly inserting a leap day for the year 2000, when in
fact it is a leap year by application of the rule of being a century
year divisible by 400.

Dave

On 2023-01-19 7:18 PM, David Spain wrote:
> fact it is a leap year by application of the rule of being a century
> year divisible by 400.
>
> Dave
>
But not by 4000. The year 4000 is not a leap year I should point out.

Dave

On Jan/19/2023 at 19:29, David Spain wrote :
> On 2023-01-19 7:18 PM, David Spain wrote:
>> fact it is a leap year by application of the rule of being a century
>> year divisible by 400.
>>
>> Dave
>>
> But not by 4000. The year 4000 is not a leap year I should point out.
>
> Dave
>

I don't think there is a central authority somewhere to make that
decision. So, it could happen than in the year 4000, we get an
international calendar mess as has happened while switching to the
Gregorian calendar. Meaning maybe March 1st, 4000 in some countries will
be February 29th in other countries. Hopefully, 1977 years will be
enough to get an agreement and resolve the matter.

Alain Fournier