Paul, the moon's orbit is slightly slower than the sun's, so gradually, over about a month, the sun overtakes it. Early this morning the moon was a C shape as the sun was coming up slightly later, to the left of it and shining on what from our point of view is its left-hand side. Once the sun has overtaken the moon, passing roughly behind it, the sun will go down in the evening first, with the moon setting slightly later, and the sun will be shining up at it on what seems to us its right-hand edge. If the sun happens to pass exactly behind the moon when it overtakes, we get a solar eclipse.

I assume that for people in the southern hemisphere it will appear the other way round, which is why I stressed the English-looking church.