Official Days are the annual days on the Newgrounds Calendar chosen by the staff to celebrate particular people and events. The site will have adverts and BBS traffic beforehand and a competition to choose the best submissions on the subject chosen. Halloween, for example, is celebrated each year by Tom announcing a competition open to all Halloween submissions, provided they include a button using the official Halloween button link to that year's Halloween collection. For the period the Staff decide to cover, the site will have a Halloween banner across the Front Page etc. and a time window of oportunity to enter Halloween submissions.