Does this poem convey sadness?

Well conceived with nicely organized movement.

I would economize slightly

The shadows that come and go (you could also eliminate "the" at the start).

"celebration" stronger than "laughter"

I have seen blackened skies, their storms

touched salt water in restless tides

Held trembling hands seeking warmth

In between, fleeting tomorrows ( also you might rethink "fleeting"...over-used)

Unaware of time they borrow (I removed "the" and "that"..

but got carried away with "unaware"...sorry.

All I did was remove uneeded words, mainly articles, that

the reader will fill in for themselves, self-involving them even more

in this well written poem that conveys emotional reflection

with slight sadness..

Good closing couplet.

Yes it is dark but not as dark as the day my well dried up, my wife ran oft..stole my only pickup truck

the kids got sick and cost my seven thousand dollars, My dog got run over and started to holler. Just then when I thought it couldn't get any worse a twirlicaine twister came down and moved heaven and earth

but don't worry bout' me I'm a doin okay just another typical dark and twisted up day :)

I felt it was fairly personal until you hit the line about humanity dying.

I think it's well done and does convey a deep sadness. At the risk of irritating you, and mind you, I think you are good at this, I would replace the line about humanity died.

to some degree yes.

my boyfriend is a Viet Nam Vet and that political war did things to him

that cannot be undone, What really saddens me is to see the way our vets are being treated now.

sorry I kind of got off track, the war kills something in a man and twists other things in his mind.

An emotional and overwhelmingly sad poem.

Peace is just a mere interval between wars...

yes

yes it sounds rather sad.