Keep it warm and act like your the mother of the thing that is in the egg.
About a couple months
Most egg producers will cull the flock when they reach about 18 months old.
Currently they are only for decoration and will not hatch. However Mojang have announced they plan to bring more dragons into the game, so you never know, they may be hatchable in the future.
how can you keep an egg from breaking if it is dropped
You use a Plastic egg
It will take about 2 months in all, but it depends on how old the egg was in the first place. Be careful not to disturb the egg, but try to keep it warm enough.
They keep the egg cratled in the father's feet
The pigeon sits on the egg to keep it warm and protected from prey.
You can place them in a cardboard box and line them with vermiculite. Keep the temperature at 73 to 78 degrees. Do not rotate the eggs as this will kill the embryo in the egg. They will hatch on their own in three to four months.
To cover a boiled egg on an egg stand to keep it warm.
Usually, a hen will lay an egg six months after it has hatched.
all you have to do is keep it there and not to touch it.