However, without a birth time, you cannot know the precise positions with any certainty.
For those interested in knowing the possible range of signs and degrees on a particular day, read on. The time in the birth time field is used to calculate the positions of the Sun, Moon, and planets. If you are interested in using the best average for the day, you can enter noon. If you are interested in knowing the possible range, you can note the planets' positions for 00:01 and then for 23:59, which will give you this range. On many days, the Moon can be one of two signs, as the Moon changes signs approximately every 2-1/2 days. Less likely but still possible are changes of signs with the Sun and other planets (they may be on a cusp). Again, you can check the range of possible positions. However, without a birth time, you cannot know the precise positions with any certainty.