KUALA LUMPUR: Yang di-Pertuan Agong Al-Sultan Abdullah Ri'ayatuddin Al-Mustafa Billah Shah and Raja Permaisuri Agong Tunku Azizah Aminah Maimunah Iskandariah will be gracing National Maal Hijrah 1445H celebration slated to be held at the World Trade Centre Kuala Lumpur (WTCKL) this Wednesday (July 19).