vicissitudinary

Etymology
From.

Adjective

 * 1)  pertaining to change, alteration, or mutation.
 * 2) * 1624, John Donne, Devotions upon Emergent Occasions (XIII. Meditation. Project Gutenberg):
 * We say the elements of man are misery and happiness, as though he had an equal proportion of both, and the days of man vicissitudinary, as though he had as many good days as ill ...