27 май 2016, 10:0327.05.16
Yes, you can have an 8 day cycle. As long as you begin raiding right after the raid rankings are posted, you can get 8 days worth of raids. It takes planning, that is also with the planning that you did not raid any points in the previous weeks last day.
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Weekly reset is 7 AM UTC Time Monday, Sorry i was wrong in my previous answer.