In time they will want to use the toilet your child won’t want to go to school in nappies any more than you would want them to. It’s probably easier to start in the summer, when clothes dry more quickly and there are fewer clothes to take off. Do it over a period of time when there are no great disruptions or changes to your child’s or your family’s routine.
You can try to work out when your child is ready. There are a number of signs that your child is starting to develop bladder control:
Potty training is usually fastest if your child is at the last stage before you start the training. If you start earlier, be prepared for a lot of accidents as your child learns.