The date is more likely 6th waning of Tagu 649 ME (4 April 1287) since Mon records themselves say Wareru, who was born on 20 March 1253, came to power at age 34 (35th year).
But the date is more probably 6th waning of Tagu 649 ME (Friday, ngày 4 tháng 4 năm 1287) because the Mon records themselves (Pan Hla 2004: 36) say Wareru, who was born on ngày 20 tháng 3 năm 1253, became king at age 34 (35th year).