Calendar by week number 2015 iso#

Septimana is cognate with the Romance terms derived from Latin septimana ('a seven'). Hebdomad and hebdomadal week both derive from the Greek hebdomás ( ἑβδομάς, 'a seven'). The archaism sennight ('seven-night') preserves the old Germanic practice of reckoning time by nights, as in the more common fortnight ('fourteen-night'). The seven-day week is named in many languages by a word derived from 'seven'. The Germanic word probably had a wider meaning prior to the adoption of the Roman calendar, perhaps 'succession series', as suggested by Gothic wikō translating taxis 'order' in Luke 1:8. The English word week comes from the Old English wice, ultimately from a Common Germanic * wikōn-, from a root * wik- 'turn, move, change'.

Calendar by week number 2015 iso#

5.1.3 Schematic representation of ISO week date.

The term 'week' is sometimes expanded to refer to other time units comprising a few days, such as the nundinal cycle of the ancient Roman calendar, the 'work week' or 'school week' referring only to the days spent on those activities. The Geneva-based ISO standards organization uses Monday as the first day of the week in its ISO week date system. While, for example, the United States, Canada, Brazil, Israel, Japan and other countries consider Sunday as the first day of the week, and while the week begins with Saturday in much of the Middle East, the international ISO 8601 standard and most of Europe has Monday as the first day of the week. Thousands of years later, these names are still the names of the weekdays in Hebrew, and this week construct is still the one observed in Jewish tradition.

Shabbat (equivalent to Saturday) therefore became the day of worship and rest in Jewish tradition and the last day of the week, while the following day, Sunday, is the first one in the Hebrew week. The biblical text states this is because that was the day when God rested from his work of creating the world. The first day is then given the literal name First (in Hebrew: ראשון), the second being called Second ( שני) and so forth for the first six days, with the exception of the seventh and final day, which rather than be called Seventh ( שביעי), is called Shabbat ( שבת) from the word לשבות (to rest). The Hebrew Bible offers the explanation that God created the world in six days. This is based on the Jewish week as reflected in the Hebrew Bible (also appears as the Old Testament in the Christian Bible).

Occasionally, this arrangement is instead similar to a week in the New Testament in which the seven days are simply numbered with the first day being a Christian day of worship (aligned with Sunday, offset from ISO 8601 by one day) and the seventh day being a sabbath day (Saturday). Such a week may be called a planetary week. In English, the names are Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday, then returning to Monday. In many languages, the days of the week are named after classical planets or gods of a pantheon. It is the standard time period used for cycles of rest days in most parts of the world, mostly alongside-although not strictly part of-the Gregorian calendar. The week is divided into seven days, and each day into 24 hours, 96 puncta (quarter-hours), 240 minuta (tenths of an hour) and 960 momenta (40th parts of an hour).Ī week is a time unit equal to seven days. In the following example, EXTRACT returns values corresponding to different time parts from a column of dates near the end of the year.Circular diagrams showing the division of the day and of the week, from a Carolingian ms. In the following example, EXTRACT returns a value corresponding to the DAY time part. ISOYEAR: Returns the ISO 8601 week-numbering year, which is the Gregorian calendar year containing the Thursday of the week to which date_expression belongs.The first ISOWEEK of each ISO year begins on the Monday before the first Thursday of the Gregorian calendar year. ISOWEEK: Returns the ISO 8601 week number of the date_expression.Weeks begin with Sunday, and dates prior to the first Sunday of the year are in week 0. WEEK: Returns the week number of the date in the range.DAYOFWEEK: Returns values in the range with Sunday as the first day of the week.2) Returns a Date from a Date & Time field or expression.ĮXTRACT(DATE FROM datetime_expression) Parametersĭate_expression - a Date or a Date & Time field or expression.ĭatetime_expression - a Date & Time field or expression.