HALCYON

adj.
denoting very calm and peaceful as applicable to days or an era.

the origin goes to medieval times with the sailors spotting kingfisher (also called halcyon), and thus inferring no strom was coming, since the bird would fly only when the expected times were non-stormy.

In these times of constant strife, I have just fogged memory of the halcyon days.

Turbulence outside yet halcyon within, this is what a yogi is like.