WEEKVw. Format

Writes a week number in decimal format by using the V algorithm.
Category: Date and Time
Alignment: left

Syntax

WEEKVw.

Syntax Description

w
specifies the width of the output field.
Default:11
Range:3–200

Details

The WEEKVw. format writes the various formats depending on the specified width. Algorithm V calculates the SAS date value, with the number-of-the-week value represented as a decimal number in the range 01–53, with a leading zero and maximum value of 53. Weeks begin on a Monday and week 1 of the year is the week that includes both January 4th and the first Thursday of the year. If the first Monday of January is the 2nd, 3rd, or 4th, the preceding days are part of the last week of the preceding year. For example, the fifth week of the year would be represented as 06.
Refer to the following table for widths, formats, and examples:
Widths
Formats
Examples
3-4
Www
w01
5-6
yyWww
12W01
7-8
yyWwwdd
12W0101
9-10
yyyyWwwdd
2012W0101
11-200
yyyy-Www-dd
2012-W01-01

Comparisons

The WEEKVw. format writes the week number as a decimal number in the range 01–53, with weeks beginning on a Monday and week 1 of the year including both January 4th and the first Thursday of the year. If the first Monday of January is the 2nd, 3rd, or 4th, the preceding days are part of the last week of the preceding year. The WEEKWw. format writes the week number of the year as a decimal number in the range 00–53, with Monday as the first day of week 1. The WEEKUw. format writes the week number of the year (Sunday as the first day of the week) as a decimal number in the range 0–53, with a leading zero.

Example

sasdate='31JAN2012'd; 
Statements
Result
----+----1----+
v=put(sasdate,weekv3.);
w=put(sasdate,weekv5.);
x=put(sasdate,weekv7.);
y=put(sasdate,weekv9.);
z=put(sasdate,weekv11.);
put v;
put w;
put x;
put y;
put z;





W05
12W01
12W0502
2012W0502
2012-W05-02

See Also

Functions:
WEEK Function in SAS Functions and CALL Routines: Reference