The term dates for all Queensland state schools are published on the Department of Education website.
https://education.qld.gov.au/about-us/calendar/term-dates
Bullyard State School observes the Royal Queensland Show Public Holiday for Bundaberg Region—within the postcode of 4671. The exact date can be found at the below link.
https://www.qld.gov.au/recreation/travel/holidays/show
Please note that schools closer to Bundaberg in the 4670 Postcode observe a different show holiday date.