Post day can be referred to by a number of different synonyms. It may be called delivery day if referring to the day when items are delivered in the mail. Alternatively, it may be known as shipping day if speaking about the day when items are shipped out. The term dispatch day may also be used in this context. If referring to the day when items are sent out on social media, post day may also be called share day. In the context of blogs or articles, post day may be referred to as publication day or release day. Whatever the term used, post day is an important day for sending out content and reaching a wider audience.