In this chapter all definitions for both Attributes and Metrics are presented. To keep things organized, we've created three separate pages, so you can find the definitions per dataset.
The following information is recurring in all underlying chapters: ISO week & ISO year
The ISO week and ISO year are issued by the International Organization for Standardization and are used to create a standard and a comparable week and year number. A week number in ISO will always start on a Monday, independent of the actual first date of the year (January first). The first week of the year always contains the 4th of January & the Thursday is always a January-day. So basically the first week can be as below, or anything in between:
Day of Week
Date
Day of Week
Date
Monday
4th of January
Monday
29th of December
Tuesday
5th of January
Tuesday
30th of December
Wednesday
6th of January
Wednesday
31st of December
Thursday
7th of January
Thursday
1st of January
Friday
8th of January
Friday
2nd of January
Saturday
9th of January
Saturday
3rd of January
Sunday
10th of January
Sunday
4th of January
Due to this mapping, the ISO year has 52 weeks (364 days) or 53 weeks (371 days). The week number also determines which ISO year a date belongs to (e.g. December 31st 2019 belongs to ISO week 1 of the next year, so the ISO year of 31-12-2019 is 2020).