Positive life events can actually trigger depressive episodes.
This happens for a few reasons: First, a spike and then de-
cline in mood or attitude can exacerbate stress. Second, the
expectation that a positive event will eliminate all stress
and bring unprecedented happiness is a destructive one,
because the event rarely does that. This is why weddings,
childbirth, or a new job can be so incredibly stressful. On
top of being a massive life change, there’s also the silent
assumption that this should be a wholly positive thing,
and anxiety and tension should be eliminated.