Review Sheet for Weeks #1ã‚â4(Material for in Class Exam #1 Biol 212
Most years in the Gregorian agenda have 52 full weeks and one 24-hour interval. Jump years have 52 full weeks and two extra days. Sure years in the Gregorian calendar, however, will have 53 numbered weeks. These are the years when January 1 falls on a Thursday or is a bound year that starts on a Wednesday. While such numbered years are commonly used in Asian and European countries, they are not equally popular in the US.
The vii-Solar day Calendar week
Of all the units of time in a year, simply the 7-day week is an artificial period of time. The day is based on the 24-hour night-24-hour interval bike, the month on the wheel of the moon phases, and the year on the fourth dimension it takes Earth to complete an orbit effectually the Sun. The week is unique in that it is non based on any astronomical miracle that constitutes a unit of time.
It is generally accepted that the seven-twenty-four hours calendar week was adopted from the biblical account of the creation where information technology took God six days to create the universe and so rested on the 7th mean solar day. This is reflected in the seven-solar day period for the ancient Israelites where they piece of work for half dozen days and dedicate the seventh day to rest and for worshipping God. Some theorize that the Israelites may accept adopted the vii-day week from before religious traditions of the Sumerians and Babylonians.
Days of the Week
Many historians are in agreement that information technology was the Romans who firmly established the modernistic seven-day week, by calculation features from the Babylonians' seven-day week system. This is evidenced by some of the days of the week being named subsequently Roman deities. These days are Sunday, which the Romans defended to the Sun god, Monday for the Moon god, and Saturday for Saturn. The Romans used to have 8 days a calendar week as a ceremonious practice until 321 C.E. when Emperor Constantine established the vii-day week.
Anglo-Saxon Influence
Other Roman deities inspired the name of the other days of the week such as Mars' day (Tuesday), Mercury'south day (Wednesday), Jupiter'southward day (Thursday) and Venus' day (Fri). The days of the week in other languages, peculiarly those belonging to the Romance language still carry this influence.
The names in English language of days of the week, however, apart from Sabbatum, Dominicus and Monday, have Anglo-Saxon origins. Names of the gods of Teutonic Mythology were used for the other weekdays. Tuesday was derived from Tiu, which is the Anglo-Saxon proper name for the Norse god of war Tyr. Wed was named afterwards Woden, the Anglo-Saxon proper noun for the Norse supreme god Odin, while Thursday was named after the god of thunder, Thor. Friday or Frigg's solar day was named after Frigg, the wife of Odin.
Does the Calendar week Start on a Sunday or Monday?
When Emperor Constantine established the seven-day week in 321 C.E., he besides designated Lord's day every bit the start of each week. Calendars and week numbering systems in the United states, Canada, Australia, and New Zealand besides offset each week on a Dominicus.
The International Standard ISO 8601, which is the near common week numbering organisation in the world, starts the week on Monday and ends on Lord's day. Using the ISO 8601 will help mitigate the confusion and doubt in international correspondence between different calendar week numbering systems and fourth dimension zones.
Weekdays and Weekends
Most of Christendom dedicate Sunday equally a day for worship or residuum. Islam, on the other paw, designates Friday as their mean solar day of residue. Judaism has long designated Saturday every bit the day of Sabbath and rest. Traditional calendars mark weekend days equally ruddy to make them stand up out from the residual of the weekdays, which are normally colored blue or grey.
Source: https://www.reference.com/science/many-weeks-year-263147d70bb71603?utm_content=params%3Ao%3D740005%26ad%3DdirN%26qo%3DserpIndex
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