The metric system is the most used calendar. Its easy to use.

1. What is the current calendar most of the world uses / accepts? Explain who made it and why this is accepted. • The metric system is the most used calendar. Its easy to use.

2. What is a leap year? A leap year (or intercalary year) is a year containing one extra day (or, in the case of lunisolar calendars, a month) in order to keep the calendar year synchronized with the astronomical or seasonal year.

3. List three other types of calendars used and how they set up their calendar (ex. Lunar). The Hebrew Calendar The Islamic Calendar The Gregorian Calendar Years are counted from the initial epoch defined by Dionysius Exiguus, and are divided into two classes: common years and leap years. A common year is 365 days in length; a leap year is 366 days, with an intercalary day, designated February 29, preceding March 1. Leap years are determined according to the following rule: Years are counted from the Era of Creation, or Era Mundi, which corresponds to -3760 October 7 on the Julian proleptic calendar. Each year consists of twelve or thirteen months, with months consisting of 29 or 30 days. An intercalary month is introduced in years 3, 6, 8, 11, 14, 17, and 19 in a nineteen-year cycle of 235 lunations. The initial year of the calendar, A.M. (Anno Mundi) 1, is year 1 of the nineteen-year cycle. The seven-day week is observed with each day beginning at sunset. Weekdays are specified by number, with day 1 beginning at sunset on Saturday and ending at sunset on Sunday. Day 5, which is called Jum'a, is the day for congregational prayers. Unlike the Sabbath days of the Christians and Jews, however, Jum'a is not a day of rest. Jum'a begins at sunset on Thursday and ends at sunset on Friday. [Erratum: It appears that Doggett should have stated that Jum'a is Day 6, not Day 5.]

4. What is BC? • bc is "an arbitrary precision calculator language" with syntax similar to the C programming language. It is generally used by typing the command bc on a Unix command prompt and entering a mathematical expression, such as (1 + 3) * 2, whereupon 8 will be output.

5. What is BCE? • Common Era, abbreviated as CE, is a designation for the world's most commonly used year-numbering system. The numbering of years using Common Era notation is identical to the numbering used with Anno Domini (BC/AD) notation, being the current year in both notations and neither using a year zero.

6. What is AD? • Anno Domini (abbreviated as AD or A.D., sometimes found in the irregular form Anno Domine) and Before Christ (abbreviated as BC or B.C.) are designations used to label years in the Julian and Gregorian calendars. ...

7. What is CE? • Common Era, abbreviated as CE, is a designation for the world's most commonly used year-numbering system. The numbering of years using Common Era notation is identical to the numbering used with Anno Domini (BC/AD) notation, being the current year in both notations and neither using a year zero.

8. What is MYA? • MYA" stands for millions of years ago.

9. According to the timeline site how many periods of when are there and list time. http://www.google.ca/search?q=According+to+the+timeline+site+how+many+periods+of+when+are+there+and+list+time.&hl=en&sa=G&tbs=tl:1&tbo=u&ei=KpaXTLqiK4yhnQehiv3SCA&oi=timeline_result&ct=title&resnum=11&ved=0CD8Q5wIwCg

10. What is an eon, epoch, era, and age? • The largest defined unit of time is the supereon, composed of eons. Eons are divided into eras, which are in turn divided into periods, epochs and ages. The terms eonothem, erathem, system, series, and stage are used to refer to the layers of rock that correspond to these periods of geologic time

11. List three ancient calendars The civil calendar The Ancient Egyptians were highly organised with a very efficient central government. The administrators needed a calendar simpler than one in which they did not know when the month started until the Priests had looked at the sunrise, and in which all the months had the same number of days and all the years the same number of months. So they introduced a civil calendar containing twelve months each with thirty days, and each month containing three weeks of ten days, and then five days of public holidays to bring the year to three hundred and sixty five days. These five holidays celebrated the birthdays of Osiris, Isis, Horus, Nephthys and Seth. The problem was that this calendar did not have leap years. • Babylonian calendarThe ancient Babylonians used a calendar with alternating 29- and 30-day months. This system required the addition of an extra month three times every eight years, and as a further adjustment the king would periodically order the insertion of an additional extra month into the calendar. The Egyptian calendar The earliest Egyptian calendar was based on the moon’s cycles, but the lunar calendar failed to predict a critical event in their lives: the annual flooding of the Nile river. The Egyptians soon noticed that the first day the "Dog Star," which we call Sirius, in Canis Major was visible right before sunrise was special.

12. List two ancient clocks and how they worked. • A water clock or clepsydra (Greek κλέπτειν kleptein, 'to steal'; ὕδωρ hudor, 'water') is any timepiece in which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel where the amount is then measured. Sun Clocks After the Sumerian culture was lost without passing on its knowledge, the Egyptians were the next to formally divide their day into parts something like our hours. Obelisks (slender, tapering, four-sided monuments) were built as early as 3500 B.C. Their moving shadows formed a kind of sundial, enabling citizens to partition the day into two parts by indicating noon.

13. What was a revolution of timekeeping? • An accuracy within 1 part in 1011 can now be obtained in the measurement of time and frequency. The basis of the unit of tims which has been in use since 1958 is the caesium standard, using the atomic-beam tube; another potential standard is the hydrogen maser, and the rubidium gas cell is a good working standard.

14. What allows for standard more accurate clocks? • Scientists have built a clock that is 100,000 times more accurate than the atomic clock currently used for establishing the official time around the world. It was developed by a team led by Chin-wen Chou of the National Institute of Standards and Technology in Boulder, Colorado: • The quantum-logic clock, which detects the energy state of a single aluminum ion, keeps time to within a second every 3.7 billion years. The new timekeeper could one day improve GPS or detect the slowing of time predicted by Einstein’s theory of general relativity.[...]

15. What are time zones? • Eastern North American Eastern Time Zone The Eastern Time Zone of the Western Hemisphere falls mostly along the east coast of North America and the west coast of South America. Its time offset is −5 hrs GMT or UTC−5 during standard time and UTC−4 during daylight saving time...

16. What is the prime meridian? • Meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England

17. If it’s 10:00 AM in Regina, what time is it in Toronto? London? Moscow? Tokyo? Hawaii?

18. What is Daylight Saving Time? Do we use this in Saskatchewan • The provincial government (of Saskatchewan) received requests to adopt Daylight Saving Time, has examined the issue in detail and has decided to retain the current time system established under The Time Act for all of Saskatchewan. This issue is a divisive one with no consensus apparent within the whole province. • Saskatchewan is naturally located within the Mountain Standard Time (MST) zone which runs from just west of Winnipeg, Manitoba to just east of Lethbridge, Alberta. • The Time Act of 1966 was a compromise solution that allowed all of the province to observe Central Standard Time. During the summer months all of Saskatchewan observes Central Standard Time. Only the Battle River (Lloydminster) Time Option area follows Mountain Standard Time during the winter. The rest of the province is on Central Standard Time year round

19. Is there a year zero? • "Year zero" does not exist in the widely used Gregorian calendar or in its predecessor, the Julian calendar. Under those systems, the year 1 BC is followed by AD 1. However, there is a year zero in astronomical year numbering (where it coincides with the Julian year 1 BC) and in ISO 8601:2004 (where it coincides with the Gregorian year 1 BC) as well as in all Buddhist and Hindu calendars.

20. Are we starting a new decade in 2010 or 2011? • We never had a 'year 0', so 2011 is the start of a new decade.Similarly, the year 2000 was the last year of the previous century.But as with many things, the 'popular culture' version generally takes over from the 'technically correct' version.

21. What is linear time? • In computer science, the time complexity of an algorithm quantifies the amount of time taken by an algorithm to run as a function of the size of the input to the problem. The time complexity of an algorithm is commonly expressed using big O notation, which suppresses multiplicative constants and lower order terms. When expressed this way, the time complexity is said to be described asymptotically, i.e., as the input size goes to infinity. For example, if the time required by an algorithm on all inputs of size n is at most 5n3 + 3n, the asymptotic time complexity is O(n3).

22. What is cyclical time? • Ancient Indian Cyclic Time System • In the Indian system, Years are named and there are 60 names. Once the 60 names are finished, the next year starts with the first name again. This goes on in a cyclic manner. Beyond this level there are 4 epochs or Yugas, namely, Krita Yuga, Treta Yuga, Dvapara Yuga, and Kali yuga. They are not equal in the length of time. Duration of each epoch is as follows: • Krita-yuga: 1,728,000 years • Treta-yuga: 1,296,000 years • Dvapara-yuga: 864,000 years • Kali-yuga: 432,000 years