Home : Weekly Beginning and Ending Dates
Q10530 - INFO: Weekly Beginning and Ending Dates

Weekly calculations in both the Math Toolbox Functions and the Spread Report Functions typically allow the beginning and ending date to be defined by a number n in the calculation definition.
Table below describes supported values of n. You may also want to look at this example article that visually portrays the differences between supported values of n.

n

Beginning On

Ending On 

Notes

1

Monday

Sunday

 

2

Tuesday

Monday

 

3

Wednesday

Tuesday

 

4

Thursday

Wednesday

 

5

Friday

Thursday

 

6

Saturday

Friday

 

7

Sunday

Saturday

 

8

1st
8th
15th
22nd

7th
14th
21st
Last Day of Month

 

9

1st
8th
15th
22nd

7th
14th
21st
28th

Days greater than the 28th are ignored

10

1st
8th
15th
22nd
29th

7th
14th
21st
28th
Last Day of Month

 

11

Monday (or first of the month) 

Sunday

 

12

Tuesday (or first of the month) 

Monday

 

13

Wednesday (or first of the month) 

Tuesday

 

14

Thursday (or first of the month)

Wednesday

 

15

Friday (or first of the month) 

Thursday

 

16

Saturday (or first of the month) 

Friday

 

17

Sunday (or first of the month)

Saturday

 

18

Sunday

Saturday

Always calculates Sunday to Saturday. This is also called the "Wednesday Rule".  Whatever month contains the Wednesday is the month that will get the weekly stat. Whatever month has the Wednesday, has at least 4 days in that month, therefore, it is the month that contains the greatest number of days for that week.  The data value is placed on Saturday unless the last week of the month spans into the next month and the Wednesday is in the current month.  In which case the data value will be placed on the last day of the current month. For an example of WEEK18 see article 10539

19

Sunday

Saturday

Always calculates Sunday to Saturday. Data is considered to be part of the month that the most data falls into. If there is equal data from each month in a single week, the data is placed on the Saturday

20

Sunday

Saturday

Calculates only complete weeks within the month.

22

1st
8th
15th
22nd
23rd,24th, or 25th

7th
14th
21st
28th
Last Day of Month

The fifth week is the last 7 days of the month.  If the month only has 28 days, the fifth weekly average will not be calculated.  Used in Ohio.
23 Sunday (or first of the month) Saturday (or end of the month) Sunday thru Saturday, the last week of the month is Sunday thru the last day of the month.  The first week of the month is the 1st thru Saturday.
24 Sunday Saturday Sunday thru Saturday, values are calculated on the Sunday (i.e. the start date of the week). 
99 Start Date of Report

The start date of week 1 is the start date of the report, week 2 starts 7 days later... ONLY SUPPORTED IN SPREAD REPORTS.

Related Articles
Q10539 - INFO: Week Definition Comparison

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Created on 10/12/2007 10:07 AM.
Last Modified on 5/18/2020 9:16 AM.
Last Modified by Scott Dorner.
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