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cengland0 SSCertifiable Points: 6102 More actions · Answer 1

OCTom (12/15/2010)
The Y2K rush was exciting, boring, tedious, scary...
This question does make one wonder why 2-digit years are still in use. However, since SQL Server dates only go out to 12-31-9999, we should get ready for y10k soon. 😉
Thanks for bringing back the memories.

Not necessary. According to some people, the Mayan calendar shows the world will end on December 21, 2012 anyway.

http://en.wikipedia.org/wiki/2012_phenomenon

Carlo Romagnano SSC-Insane Points: 22666 More actions · Answer 2

the Mayan calendar shows the world will end on December 21, 2012 anyway.

Mayan calendar BUG: 12/12/2012 is the end.

:-D:-D:-D

cengland0 SSCertifiable Points: 6102 More actions · Answer 3

Carlo Romagnano (12/16/2010)
the Mayan calendar shows the world will end on December 21, 2012 anyway.
Mayan calendar BUG: 12/12/2012 is the end.
:-D:-D:-D

Actually, it's 12/21/2012

Carlo Romagnano SSC-Insane Points: 22666 More actions · Answer 4

cengland0 (12/16/2010)
Carlo Romagnano (12/16/2010)
the Mayan calendar shows the world will end on December 21, 2012 anyway.
Mayan calendar BUG: 12/12/2012 is the end.
:-D:-D:-D
Actually, it's 12/21/2012

It depends on "Regional Settings".

:-D:-D:-D:-D

cengland0 SSCertifiable Points: 6102 More actions · Answer 5

Carlo Romagnano (12/16/2010)
cengland0 (12/16/2010)
Carlo Romagnano (12/16/2010)
the Mayan calendar shows the world will end on December 21, 2012 anyway.
Mayan calendar BUG: 12/12/2012 is the end.
:-D:-D:-D
Actually, it's 12/21/2012
It depends on "Regional Settings".
:-D:-D:-D:-D

I hope you're kidding because I know of settings that can change from mm/dd/yyyy to dd/mm/yyyy or yyyy/mm/dd but none that will change a 21 to a 12.

john.arnott SSChampion Points: 11882 More actions · Answer 6

cengland0 (12/16/2010)
Carlo Romagnano (12/16/2010)
cengland0 (12/16/2010)
Carlo Romagnano (12/16/2010)
the Mayan calendar shows the world will end on December 21, 2012 anyway.
Mayan calendar BUG: 12/12/2012 is the end.
:-D:-D:-D
Actually, it's 12/21/2012
It depends on "Regional Settings".
:-D:-D:-D:-D
I hope you're kidding because I know of settings that can change from mm/dd/yyyy to dd/mm/yyyy or yyyy/mm/dd but none that will change a 21 to a 12.

There could be a super-secret release that offers the expression of a day number in base nineteen.;-):hehe::-D:-)

cengland0 SSCertifiable Points: 6102 More actions · Answer 7

john.arnott (12/16/2010)
There could be a super-secret release that offers the expression of a day number in base nineteen.;-):hehe::-D:-)

I did some research on the Mayan calendar and it seems they used a base 20 numbering system. Very interesting. Also, They had two calendars. One was 260 days long (13 * 20) and the other was 360 (18 * 20) plus 5 bad luck days at the end of the year. That gave them 365 days total for each year. Unfortunately they didn't account for the extra quarter day (.256) each year (leap years) so after a couple centuries, their calendars would have been all messed up and no longer tied to the seasons properly.

I'm still curious what the 260 day calendar was for. There are some good theories and the best one is for the pregnancy cycles. It is 260 days from the first missed period to the birth of the child. We currently use a 280 day cycle (40 weeks) but that is from the date of the last period instead of the missed period.

Now, they discovered another Mayan calendar that uses 819 days. I cannot find any reason for this number of days. I thought it could be other planet orbits but Mars takes 686.95 days and Jupiter 4337. The 819 falls in between. Anyone else have any clue what they would count 819 days for?

Sean Lange SSC Guru Points: 286590 More actions · Answer 8

cengland0 (12/16/2010)
john.arnott (12/16/2010)
There could be a super-secret release that offers the expression of a day number in base nineteen.;-):hehe::-D:-)
I did some research on the Mayan calendar and it seems they used a base 20 numbering system. Very interesting. Also, They had two calendars. One was 260 days long (13 * 20) and the other was 360 (18 * 20) plus 5 bad luck days at the end of the year. That gave them 365 days total for each year. Unfortunately they didn't account for the extra quarter day (.256) each year (leap years) so after a couple centuries, their calendars would have been all messed up and no longer tied to the seasons properly.
I'm still curious what the 260 day calendar was for. There are some good theories and the best one is for the pregnancy cycles. It is 260 days from the first missed period to the birth of the child. We currently use a 280 day cycle (40 weeks) but that is from the date of the last period instead of the missed period.
Now, they discovered another Mayan calendar that uses 819 days. I cannot find any reason for this number of days. I thought it could be other planet orbits but Mars takes 686.95 days and Jupiter 4337. The 819 falls in between. Anyone else have any clue what they would count 819 days for?

Several speculations are that 819 = 7 * 9 * 13. There 13 Gods of the heavens, 9 of the underworld and 7 of the earth.

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TomThomson SSC Guru Points: 104773 More actions · Answer 9

TomThomson

SSC Guru

Points: 104773

December 16, 2010 at 6:18 pm

#1263822

nice clear unambiguous question. Thanks.

Tom

Carlo Romagnano SSC-Insane Points: 22666 More actions · Answer 10

There could be a super-secret release that offers the expression of a day number in base nineteen.;-):hehe::-D:-)

The date 21 december 2012 depends on the fact that mayan DBA are still using Slqserver sybase 1.0 and the datetime is limited to 21 december 2012.

We are using sqlserver 2008 R2 and datetime limit is 31 december 9999 (next real end of world).

payal vyas SSC Rookie Points: 31 More actions · Answer 11

Nice question, didn't have any idea about cut off year.

terrykzncs Ten Centuries Points: 1324 More actions · Answer 12

I was kind off expecting SQL to throw an error due to regional settings. I am in South Africa and we specify the day before the month (the day is after all smaller than the month).

Are there any regional settings when this won't work?

It did throw a fault when I ran:

SELECT CAST('22/02/00' AS DATETIME)

which would be 'dd/mm/yy'.

Good question but SQL would throw an error it wasn't 02 February all the time.