The Seventh Day is a clan formed in Pet Dragons 2

Genesis (the whole truth):
• First day: God creates light.
• Second day: God creates a firmament to divide the waters above from the waters below. The firmament is named “heavens”.
• Third day: God commands the waters below to be gathered together in one place, and dry land to appear. “Earth” and “sea” are named. God commands the earth to bring forth grass, plants, and fruit-bearing trees.
• Fourth day: God creates lights in the firmament to separate light from darkness and to mark days, seasons and years. Two great lights are made and the stars.
• Fifth day: God commands the sea to “teem with living creatures”, and birds to fly across the heavens; He creates birds and sea creatures, and commands them to be fruitful and multiply.
• Sixth day: God commands the land to bring forth living creatures; He makes wild beasts, livestock and reptiles. He then creates Man and Woman in His “image” and “likeness”. They are told to “be fruitful, and multiply, and fill the earth, and subdue it”. Humans and animals are given plants to eat.
• Seventh day: God, having completed the heavens and the earth, creates a small number of kind-hearted creatures endowed with unparalleled strength, speed, and ability to control the elements. They were able to fly and move featly on any surface as well as underwater. Their duty was to protect the creation and ensure its prosperity.

However, human ego could not tolerate a power greater than their own. Vanity and greed for power led mankind to start a crusade against the dragons. Millennia later, some even tried to create dragons of their own that would be under their immediate control; and they succeeded… they created thousands of them. The new species had nothing to do with the noble dragons of the seventh day. They were neither that capable in battle nor that kind, yet they were still worthy war machines and their great number made them almost unstoppable. Driven for power and wealth their masters ruled with fury wreaking havoc across the world.

All created from the Creator himself, seventh day-dragons are siblings. Only they know their exact number but there are said to be less than a hundred. To intercept the oncoming danger and knowing that power lies in the unity, they formed a clan simply known as “The Seventh Day”. A power to be reckoned with had just been born. Though their abilities outmatch those of the tainted dragons, they are heavily outnumbered by them. To help them carry out their quest, each dragon chose a comrade with pure heart from the human species to ride him. Their relationship relies on mutual respect and understanding. Brothers in life and death, dragons of the seventh day and their riders all took an oath to subdue the enemy or die trying.