What's the Current Week Number?

 

 This week is week ...

 

 
Week 10 is from March 7, 2010 until March 14, 2010

Week number according to the ISO-8601 standard, weeks starting on Monday. The first week of the year is the week that contains that year's first Thursday. The highest week number in a year is either 52 or 53.

 Week numbers in Perl

my $weekNumber = POSIX::strftime("%V", gmtime time);
Replace time with other epochs for other week numbers.  

 Week numbers in PHP

$weekNumber = date("W");
or date("W", epoch) for other week numbers. Remember to use capital 'W' not 'w'.

 Week numbers in SQL

In MySQL: SELECT WEEKOFYEAR(NOW())
Replace now() with other dates eg. SELECT WEEKOFYEAR('2008-02-20');
(You can also use the WEEK function with mode=3 select week(now(),3))

In MS SQL Server SELECT DATEPART( wk, GETDATE() )

Also see: Current day number