What did God make the third day?

The Bible answers:

(Genesis 1:9-13)" . . .And God went on to say: "Let the waters under the heavens be brought together into one place and let the dry land appear." And it came to be so. 10 And God began calling the dry land Earth, but the bringing together of the waters he called Seas. Further, God saw that [it was] good. 11 And God went on to say: "Let the earth cause grass to shoot forth, vegetation bearing seed, fruit trees yielding fruit according to their kinds, the seed of which is in it, upon the earth." And it came to be so. 12 And the earth began to put forth grass, vegetation bearing seed according to its kind and trees yielding fruit, the seed of which is in it according to its kind. Then God saw that [it was] good. 13 And there came to be evening and there came to be morning, a third day."

The Bible does not say how long the third day lasted (or any other creative day for that matter) but apparently some time went by as earth emerged up from the watery expanse (as it still does today,) dry ground emerged (over time) and it was made to be capable of supporting seeds and plant life (according to its kind, as it still is.)