As I said, the mold was in the backs and bottoms of the cabinets and
drywall.
The leak spilled onto the backs and bottoms of the cabinets and
drywall and concrete blocks.
The mold smell comes from the cabinets and drywall and concrete
blocks.
There is no mold nor mold smell elsewhere in the house.

It's quite possible that the wall (south and east facing) is doing
like yours did.

The cabinets are the standard-issue fare that you may purchase at any
home-improvement store.
Night air wouldn't change your environment as far as I know. Is the
smell local to where the
leak was, or throughout the house? How extensive was the damage?
Where? Where do you
notice the odor? Two things come to mind: carpet, bedding, clothing
might have soaked up
the odor....cleaning/laundering them might help. Second, if you close
up the house or a particular
room in the evening, then less circulating air might make the smell more
pronounced.

What kind of cabinets were affected? How repaired? What about
flooring? More info would
help, perhaps.

I repapered a bath about three years ago - the old paper was peeling and
had mildew along the
seams that had begun to open. I washed the wall well with bleach before
putting on the new
paper, but I noticed the same area is beginning to darken. I am sure
the mildew is back, but
I'm not going to paper again until I need to. This is an outside wall,
and our bath appears to have
studs that are 2" rather than 4". Concrete block and stucco, Florida.
I suspect there is moisture
in the wall - perhaps sucked in through outlets or other openings and
condensing when it cools???
The outside wall is south facing,
gets a lot of sun during the day, so I suppose it could warm up enough
to pull moist air into the wall space.
I can't figure out any other reason for the mildew - the outside of the
wall is sound, no cracks or
peeling paint.