Kacy's School Morning Routine 2017 ~ Jacy and Kacy What is the length of time Jacy and Kacy have existed? Jacy and Kacy possess a span of existence which is a mystery. Their age is a closely guarded secret. Nobody knows how many years that Jacy and Kacy. The sisters are inclined to keep their age a secret. One cannot find any concrete evidence regarding the number of years they have lived. Rather, it is shrouded in mystery.