Reference: www.mypanchang.com
Karadyan Nombu or Savitri Nombu is vratam observed by Tamil women for long life of their husband. This vrat is similar to Vrata Savitri Vratam.
Karadyan Nombu timgings for 2012:
For other countries Please visit http://www.mypanchang.com/panchangam2012.php and look for sun's mina rashi pravesha timings.