I think that you can just leave them in a cool place, because eggs need to be warm to hatch.
They quack
12 days
duck eggs can take up to 35 days till hatching. but if you have already open the egg yourself then the duck is dead
No
Duck eggs should be kept at a temperature of around 99.5°F (37.5°C). This can be achieved by using an incubator or a broody duck for natural hatching. It's important to maintain a consistent temperature throughout the incubation period for successful hatching.
No, the biological enzymes in the duck prevent the hatching of the egg. and ducks hate fireworks, so July pretty much sucks for them. Is this for real? (above?)
Eggs hatching
Hatching.
Moult and insufficient day-length.
I see that the eggs are hatching now. I am hatching an idea about that.
Ducks do not have a traditional pregnancy like mammals; instead, they lay eggs. The incubation period for duck eggs is typically around 28 days, depending on the species. During this time, the female duck will sit on the eggs to keep them warm and ensure proper development. After hatching, ducklings are relatively independent and can often swim and find food shortly after.
The eggs break and the babies come out. This is called hatching.