Pause the march of time and set the clock to midnight. Click on the days of the calendar to answer these questions: On what day is the Moon first visible at midnight? and for how many days is the moon visible at midnight? It is first visible on day 9 and remains visible until day 21 or 12 days. It is first visible on day 12 and stays visible for 14 days. It is first visible on day 8 and stays visible until day 19 about 11 days. It is first visible on day 15 and stays visible for 6 days.