AIG gets both the theology and science completely wrong. They do this on purpose to extract money from dupes who are ignorant of science. One thing they get wrong is young earth and interpreting "yom" as a 24 hr day. Gen 2:4 insists on indefinite period as the correct translation.
God may not change, but a comparison of the OT and NT would not confirm that if taken literally.
How else would we translate and there was evening and morning, ONE DAY. ~wy or the transliterated word YOWM is day and it occurs 137 times in Genesis. If we look at the other usage what other meaning could be implied?