thank one's lucky stars

Etymology
From the belief that it is the alignment of the stars which brings about good fortune.

Verb

 * 1)  To be grateful, feel oneself fortunate (especially in avoiding some calamity).

Translations

 * Finnish: kiittää onneaan
 * French: remercier sa bonne étoile
 * Polish: dziękować losowi, podziękować losowi
 * Spanish: darse con un canto en los dientes
 * Swedish: tacka sin lyckliga stjärna