It is impossible to predict the news load and content of any given day in the future. In general, most people like to send out good news early in the week, on Monday or Tuesday. In general, it's best to release news when it happens. Choose an angle. You can consider hanging your start by any of these angles.
News is also topical.
That is, there are waves of interest that vary as to subjects and attitudes. Current issues such as the environment, the family and the health-care system can provide angles for your company's news. Make sure the lead contains your story and your message. In their first drafts, many people spin their wheels. You have a story to tell and a message to convey.