birdhouse gourd seed viability?

birdhouse gourd seed viability?

After cleaning up my office, I found a bunch of birdhouse gourd seeds I had misplaced that were given to me by a friend about a year and a half ago. They're all inside a sealed, dry paper envelope (in a room about 65-75ºf). Are they still good to plant, or should I toss them? I know that seeds have a certain time length in which they're still viable, but I couldn't find any specific information about the birdhouse gourd variety. Thanks for any pointers!
Plant ID?

Plant ID?

Roses

Roses

So this is my room

So this is my room

Creeping Phlox

Creeping Phlox

i love my room

i love my room

Cooking in Poverty with Eggplant

Cooking in Poverty with Eggplant