Task

Write a program or a script that returns the date of the last Fridays of each month of a given year.

The year may be given through any simple input method in your language (command line, std in, etc).



Example of an expected output:

./last_fridays 2012
2012-01-27
2012-02-24
2012-03-30
2012-04-27
2012-05-25
2012-06-29
2012-07-27
2012-08-31
2012-09-28
2012-10-26
2012-11-30
2012-12-28



Related tasks
 Five weekends
 Day of the week
 Find the last Sunday of each month


package require Tcl 8.5
set year [lindex $argv 0]
foreach dm {02/1 03/1 04/1 05/1 06/1 07/1 08/1 09/1 10/1 11/1 12/1 12/32} {
    # The [clock scan] code is unhealthily clever; use it for our own evil purposes
    set t [clock scan "last friday" -base [clock scan $dm/$year -gmt 1] -gmt 1]
    # Print the interesting part
    puts [clock format $t -format "%Y-%m-%d" -gmt 1]
}