Share A A AWhile census night is on Tuesday, most Australians will have received material and may have already started filling out their census form. When is census night, how do you fill it out, and do you need to be at home? But, as more than 1.2 million households have already done, you can complete your census form before that date. If you complete your census form before August 11, you need to fill it out as if you were home on that day. Related Article Census Data diviners urge Aussies to keep faith in census and ignore digital crusades To protect privacy, during data processing, names and addresses are removed from other census data.