What happened on 21st December 2012?

Portal:Current events/2012 December 21

• 2012 Egyptian protests: Clashes break out in Alexandria, Egypt, on the evening of the second leg of voting in the constitutional referendum.
• 2012 terrorist attacks in Kenya:
• United Nations Flight 544 shootdown:

What was the Mayan calendar called?

Tzolk’
The Tzolk’in is also referred to as, “The Distribution of Days,” “The Divine Calendar,” or the “Sacred Round”. It is the religious calendar of the Maya Civilization. The Tzolk’in consists of 260 days; each day has a name and is associated with a number from 1 to 13, like 12 Kimi in our example date below.

Why is the Mayan calendar important?

The 260-day calendar was used to determine important activities related to the gods and humans. It was used to name individuals, predict the future, decide on auspicious dates for battles, marriages, and so on.

How did the Mayans use math?

The Maya set of mathematical symbols allowed even uneducated people to add and subtract for the purposes of trade and commerce. To add two numbers together, for example, the symbols for each number would be set side by side, then collapsed together to make a new single number.

What are the 3 Mayan calendars?

The Mayan calendar consists of three separate calendars that are used simultaneously: the Long Count, the Tzolkin (divine calendar) and the Haab (civil calendar). The latter two calendars identify days; the Long Count identifies the years.

How many months are in the Mayan calendar?

18 months
The Haab is a 365-day solar calendar which is divided into 18 months of 20 days each and one month which is only 5 days long (Uayeb). The calendar has an outer ring of Mayan glyphs (pictures) which represent each of the 19 months. Each day is represented by a number in the month followed by the name of the month.

Did Mayans invent zero?

The first recorded zero appeared in Mesopotamia around 3 B.C. The Mayans invented it independently circa 4 A.D. It was later devised in India in the mid-fifth century, spread to Cambodia near the end of the seventh century, and into China and the Islamic countries at the end of the eighth.

What symbol did the Mayans use for zero?

shell
Maya mathematics constituted the most sophisticated mathematical system ever developed in the Americas. The Maya counting system required only three symbols: a dot representing a value of one, a bar representing five, and a shell representing zero.

What is the most accurate calendar in the world?

The Gregorian calendar
The Gregorian calendar was first adopted in Italy, Poland, Portugal and Spain in 1582. It is regarded as one of the most accurate calendars in use today. But it maintains a margin of error of about 27 seconds per year – that’s one day in every 3236 years.

https://www.youtube.com/watch?v=r6E61dmlZnc