December 27, 2013 4:24 pm at 4:24 pm #611683
Why is a day twelve hours long? Why does a day have two twelve hour periods instead of ten hour periods? Why does a year have twelve months, not ten? Where do we get the idea of counting in dozens? Did someone in antiquity have six fingers on each hand and so learned how to count in base 12?
Doesn’t the Gemorah count in base 12? I recall a shtickel about dividing quantities of fruit in halves, thirds and quarters. It’s pretty hard to divide by three in base 10 but a snap in base 12.December 27, 2013 4:37 pm at 4:37 pm #997166popa_bar_abbaParticipant
Because on a sundial, it has 12 markings.December 27, 2013 4:51 pm at 4:51 pm #997167Torah613TorahParticipant
Also, because there are 12 shevatim.December 27, 2013 5:12 pm at 5:12 pm #997168
PBA, that is the question. Why does a sundial have twelve marks,. not ten?December 27, 2013 5:24 pm at 5:24 pm #997169WIYMember
You know you can google all this. Youll get more info that way.December 27, 2013 6:38 pm at 6:38 pm #997170
WIY, I know but it’s more fun to see what the denizens of the coffee room come up withDecember 27, 2013 7:37 pm at 7:37 pm #997171akupermaParticipant
The length of the day, and the month, and the year, were designed by Ha-Shem.
For the most part the current calendar system was invented in ancient Mesopotamia and was already in use by the time of Avraham Aveinu. If you have a complaint, go to Iraq and dig up a Sumerian and argue with him.December 29, 2013 1:58 am at 1:58 am #997172☕ DaasYochid ☕Participant
Why does a sundial have twelve marks,. not ten?
Because there are twelve hours in the day.
(Sometimes I think there should be a sticky thread explaining how to read popa_bar_abba’s comments.)December 30, 2013 2:59 am at 2:59 am #997173ChchamMember
Feel free to correct me if I’m wrong, but I’m pretty sure the only reason we use base-ten now is because that’s what the Europeans adopted later on. The Babylonians and Sumerians used base-twelve, and the Mayans used base-twenty, so one of the most basic forms of math (calculating time)comes from an older civilization’s mathematical system that the Europeans later drew upon in establishing their own.December 30, 2013 5:05 am at 5:05 am #997174oomisParticipant
Hashem really determined the length of the day. We only discovered how to measure it, through observation of the changes in the sun that take place during the course of that day.December 30, 2013 5:39 am at 5:39 am #997175HaLeiViParticipant
The Rambam says that the reason we use 12 is to be able to break it into thirds or fourths. This is the reason for the special number, 360.
Twelve hours of the day is based on astronomy and astrology (back from the days when they were one).December 30, 2013 6:23 am at 6:23 am #997176YW Moderator-42Moderator
In Hebrew we count in base ten. After yud=10, we have kof=20, etc. Then kuf=100, etc.December 30, 2013 6:42 am at 6:42 am #997177☕ DaasYochid ☕Participant
The Torah uses base ten – asarah, esrim, shloshim, etc.December 31, 2013 2:57 am at 2:57 am #997178oomisParticipant
“In Hebrew we count in base ten. After yud=10, we have kof=20, etc. Then kuf=100, etc.
Posted 20 hours ago #
a singular mind
The Torah uses base ten – asarah, esrim, shloshim, etc. “
Excellent points!January 2, 2014 12:28 am at 12:28 am #997179HaLeiViParticipant
A day is when you call it a day.January 5, 2014 1:40 am at 1:40 am #997180👑RebYidd23Participant
Divisibility.January 5, 2014 9:59 am at 9:59 am #997181–Participant
Feel free to correct me if I’m wrong, but I’m pretty sure the only reason we use base-ten now is because that’s what the Europeans adopted later on.
It was the French who tried making everything base ten. They were succesful in implementing the Metric system for many measurements but weren’t successful in implementing Decimal Time. At the time the English clockmakers were more advanced than the French ones. (This is the same reason that degrees of longitude are based on Greenwich and not Paris)January 5, 2014 11:59 am at 11:59 am #997182RR44Participant
What did G-d say when he created light?
Let’s call it a day
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