For God, a creative day is the evening and then the morning...nowhere in the bible is a creative day said to be 24 hours, a year or 1000 years. the "lights" were for signs and seasons, and for days and years...surely not for the convenience of God's timekeeping as He had 3 evenings and mornings before the earth had a sun, moon and stars. So, there really is no scriptural motivation to be dogmatic about how long a "creative day" is.
Jesus said the "world" is presently in darkness (seventh evening)...malachi 4:2...
"Come to Me, all you who labor and are heavy laden, and I will give you rest." Matthew 11:28
love michelle