1.) What is the current calendar most of the world uses / accepts? Explain who made it and why this is accepted.
--CIVIL CALENDAR,It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words Inter gravissimas.[4] The reformed calendar was adopted later that year by a handful of countries, with other countries adopting it over the following centuries.

2.)What is a leap year?
--The Gregorian calendar modifies the Julian calendar's regular cycle of leap years, years exactly divisible by four
3.)List three other types of calendars used and how they set up their calendar (ex. Lunar).

No. Name Days
1 January 31
2 February 28 or 29
3 March 31
4 April 30
5 May 31
6 June 30
7 July 31
8 August 31
9 September 30
10 October 31
11 November 30
12 December 31

4.)What is BC?

5.)What is BCE?

6.)What is AD?

7.)What is CE?

8.)What is MYA?

9.)According to the timeline site how many periods of when are there and list time.
14000 MYA: Big Bang: Formation of the universe
4600 MYA: Formation of the Earth.
543 MYA-490 MYA: Cambrian: Explosion of Life on Earth
290 MYA-248 MYA: Permian: Largest mass extinction
245 MYA- 65 MYA: Mesozoic: Age of Dinosaurs
5 MYA- 2500 BC: Stone age: The human era
70000BC – 8000 BC: Ice age Extinction of large mammals
9000 BC – 4500 BC: Neolithic: First permanent settlements
3200 BC – 1200 BC: Bronze age: Firs Pharaohs
1200 BC – 332 BC : Iron age: Start of the Trojan war
332 BC – 63 BC : Hellenistic Period
63 BC – 476: Roman Period
330 – 1453: Byzantine Period

10.)What is an eon, epoch, era, and age?
--geologic time scale

11.) List three ancient calendars
--Ice-age hunters in Europe over 20,000 years ago scratched lines and gouged holes in sticks and bones, possibly counting the days between phases of the moon. Five thousand years ago, Sumerians in the Tigris-Euphrates valley in today's Iraq had a calendar that divided the year into 30 day months, divided the day into 12 periods (each corresponding to 2 of our hours), and divided these periods into 30 parts (each like 4 of our minutes). We have no written records of Stonehenge, built over 4000 years ago in England, but its alignments show its purposes apparently included the determination of seasonal or celestial events, such as lunar eclipses, solstices and so on.

12.)List two ancient clocks and how they worked.

Obelisks were built as early as 3500 BCE. Their moving shadows formed a kind of sundial, enabling people to partition the day into morning and afternoon. Obelisks also showed the year's longest and shortest days when the shadow at noon was the shortest or longest of the year. Later, additional markers around the base of the monument would indicate further subdivisions of time.

Later named clepsydras by the Greeks, who began using them about 325 BCE, these were stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom. Other clepsydras were cylindrical or bowl-shaped containers designed to slowly fill with water coming in at a constant rate. Markings on the inside surfaces measured the passage of "hours" as the water level reached them. These clocks were used to determine hours at night, but may have been used in daylight as well. Another version consisted of a metal bowl with a hole in the bottom; when placed in a container of water the bowl would fill and sink in a certain time. These were still in use in North Africa in the 20th century

13.)What was a revolution of timekeeping?
--In Europe during most of the Middle Ages (roughly 500 CE to 1500 CE), technological advancement virtually ceased. Sundial styles evolved, but didn't move far from ancient Egyptian principles.

14.)What allows for standard more accurate clocks?
--In 1656, Christian Huygens, a Dutch scientist, made the first pendulum clock, regulated by a mechanism with a "natural" period of oscillation. (Galileo Galilei is credited with inventing the pendulum-clock concept, and he studied the motion of the pendulum as early as 1582. He even sketched out a design for a pendulum clock, but he never actually constructed one before his death in 1642.) Huygens' early pendulum clock had an error of less than 1 minute a day, the first time such accuracy had been achieved. His later refinements reduced his clock's error to less than 10 seconds a day.

15.)What are time zones?
--is a region of the earth that has uniform standard time, usually referred to as the local time

16.) What is the prime meridian?
--the prime meridian is the meridian (line of longitude) at which the longitude is defined zero degree.

17.)If it’s 10:00 AM in Regina, what time is it in Toronto? London? Moscow? Tokyo? Hawaii?
--toronto:11 am
--london:11 am
--moscow:6 pm
--tokyo:12 midnight
--hawaii:5 am

18.)What is Daylight Saving Time? Do we use this in Saskatchewan?
--daylight saving time was extending one hour and gain extra time.
--no saskachewan dont use day light saving time.

19.)Is there a year zero?

20.)Are we starting a new decade in 2010 or 2011?