You can't, just wait.
One cannot make a Tamagotchi V3 egg hatch. It will happen when it wants to. Replacing the battery will not help either, as it will just start the timer allover again.
around 7 months.
It does not hatch, it is just for decoration.
PRESS DA RIGHT AND left button hard
It will usually take around sixty seconds for your V5 egg to hatch. Don't worry, it never takes long!
it will in a couple of min...
12 hours?!! Press the middle button on the tamagotchi, then set the time, date, your birthday, etc. Then after about 5 minutes it will hatch.
i got one from using the gameshark too many times on my sapphire version it was in my PC box ive tries to hatch it and it doesnt hatch
If you can hatch a regular egg in there then you can hatch an ostrich egg.
* Can you make an unfertilized egg hatch? No
well yes just put in tamagotchi life