It depends on what kind of bird so I can not give you a strait answer.
They most likely will not hatch at all.
about 21 days
An incubator is used to hatch fertile eggs artificially. Nothing will hatch from an unfertilised egg.
If you can hatch a regular egg in there then you can hatch an ostrich egg.
Invest in an incubator.
It depends. Did stay out in the cold for too long? If it did it will hatch but maybe become sick or die in the egg
That egg will not hatch. Take it out. Bacteria will grow in it and also the moisture has all been lost. You do not want it to affect your other eggs that are in the incubator.
it happens mostly at day time because its warm blooded and they sleep at night
To hatch an egg at home, you will need an incubator to regulate temperature and humidity. Place the egg in the incubator and turn it regularly. Keep the environment clean and monitor the temperature and humidity levels closely. After a few weeks, the egg should hatch into a chick.
it has to be fertilized, and you can stick it in an incubator.
It takes three weeks or 21 days to hatch a fertilized chicken egg. Temperature and humidity must be maintained constantly. Two weeks is not long enough and incubation cannot be hurried.
An incubator is the best way but a simple light bulb incubator is sufficient to hatch eggs.