There is not anything in scripture that God created something in this time period you mention. The word thirty is mentioned 241 times but this is in relation to age and weights and the like.
For thirty days no one is to pray to God but king Darius for thirty days
40 days and 40 nights
No it is not possible as God promised that he would not let it rain for 40 days and 40 nights.
Job
Moses was away for 40 days and 40 nights receiving the 10 Commandments from God on Mount Sinai.
40 days and nights. Exodus, end of ch.24.
Because the earth was full of wicked things
According to the Bible, Moses fasted for 40 days and 40 nights on two occasions while he was on Mount Sinai receiving the Ten Commandments from God.
God sent the rain in order to destroy all creation that was not in the ark.
Moses spent a total of 40 days and 40 nights on top of Mount Sinai talking and hearing God.
God created days. He invented days in the seven days of Creation.
40 days and 40 nights. Wondered in the desert praying to his Father (or Father God)