As the First Planetay Hour Ruler is Mars and  Kalyaadya..

I worship Her
Who has a Terrible Form
As She is Time Personified
And Mother's Fourth Aspect !

hum hum kArE sadA rUpE nIla nIraja lOcanE
shaila dvaita mukhE daivE kAlikAvayi namOstutE

Read on at
http://www.guruvayur4u.com/html/kalikastotra.htm