This indicator is based on Dayes studies about 90minute cycles and true opens.
Similar to how ICT teaches the true day open at 0.00, Daye came up with his true year, true month, true week and true session opens.
True Year - April 1st
True Month - 2nd Monday
True Week - Monday, 6pm
True Day - 12am (Midnight)
True Session - 1:30am (London), 7:30am (New York),...