The first time I saw 2 suns was not an overcast day, but one with many large clouds.  I was a passenger on a motorcycle.  We stopped to rest at a scenic overlook along the river.  I asked my buddy to tell me how many suns he saw.  He said 2.  It was a long time ago, but it seems to me that I checked the sky to make sure it was not some reflection from the moon.  I feel confident it wasn't the moon.  What we saw was one sun very close to the other sun, just a bit to the left of the biggest one.  I can't remember if it was higher or lower.  A week later, my friend denied our conversation having said that he saw 2 suns.  I think he was afraid of being labeled nuts.  I prefer to be called peculiar!