Privacy Act 2020, s 22 (principles 7, 8)
Yes, usually. If you think any of the information about you (like your date of birth) is wrong, you can ask the school to correct it. If the school declines to correct the information, they need to tell you why. The school might decline if, for example, they disagree that the information is wrong.
You can then ask them to attach a “statement of correction” to your file. A statement of correction is your opportunity to set out what information you believe is wrong or incorrect, and to explain what you think the information should be. Keep it short.
Schools have to take all reasonable steps to make sure all the information they hold about you is accurate, up-to-date, complete, relevant and not misleading.