He said he was convinced that Malaysians fully understood and realised the importance of unity in a nation.
"Unity, stability and well-being are very important to nurture the development, strength and sovereignty of the nation," he said at the national-level Prophet Muhammad's birthday celebration, here.
The Raja Permaisuri Agong, Tuanku Hajah Haminah, was also present at the event.
The celebration, carrying the theme "Wasatiyyah Tonggak Kesatuan Ummah" (Moderation the Key to Unity of the People), was also attended by Deputy Prime Minister Tan Sri Muhyiddin Yassin, Minister in the Prime Minister's Department Datuk Seri Jamil Khir Baharom and former prime minister Tun Abdullah Ahmad Badawi.
Tuanku Abdul Halim advised the people to nurture and consolidate unity to build strength for the advancement of religion, the people and country.
"Let us together ensure the success of every reform and change by using the mould of Islam in a moderate and balanced manner as taught by Prophet Muhammad," he said.
He said the biography of Prophet Muhammad also showed that diversity in the community in terms of ethnicity, religion, culture and language was not a problem or obstacle to unity so long as moderation was applied in any approach.
At the event, Tuanku Abdul Halim presented the "Maulidur Rasul" Premier Award to former Sarawak Islamic Council president and former Sarawak mufti Datuk Seri Anis Abot.
The celebration began with a procession over a 1.7-km route by about 13,000 people, comprising representatives from government departments, statutory bodies, uniformed organisations, the private sector, tertiary institutions and schools.
Also in the procession were participants riding high-powered motorcycles, the mounted units of the police, Kuala Lumpur City Hall and Putrajaya Corporation as well as members of boating teams.
In TERENGGANU, the Sultan of Terengganu, Sultan Mizan Zainal Abidin, called on the people to nurture the two legacies of Prophet Muhammad, the Quran and the Sunnah, in their daily lives.
He said he hoped that Muslims would adhere to the Sunnah in all fields, whether it was their career, household or society, to ensure a prosperous and peaceful life.
About 15,000 people from various organisations attended the state-level celebration at the State Stadium in Kuala Terengganu. They also marched in a procession for about 2.2 kilometres, from Dataran Shahbandar to the stadium.
Also present were Terengganu Menteri Besar Datuk Seri Ahmad Said and state executive councillors, heads of government departments, community leaders and representatives of NGOs and private companies.
In NEGRI SEMBILAN, the Yang di-Pertuan Besar, Tuanku Muhriz Ibni Almarhum Tuanku Munawir, and the Tunku Ampuan Besar, Tuanku Aishah Rohani binti Almarhum Tengku Besar Mahmud, attended the state-level celebration at the Seremban Municipal Council field in Seremban.
Also present were the four Undangs and the Tunku Besar of Tampin as well as Menteri Besar Datuk Seri Mohamad Hasan.
About 20,000 Muslims representing government departments and agencies, the private sector, NGOs, political parties, and schools took part in a procession around Seremban led by Tuanku Muhriz.
In his speech, Mohd Khalil urged all parties not to raise issues that could cause resentment and restlessness among Muslims and non-Muslims.
In JOHOR, the Sultan of Johor, Sultan Ibrahim Sultan Iskandar led about 10,000 Muslims in a two-km procession from the Segamat Square to the Segamat Jamek Mosque to attend the state-level celebration.
Tuanku Raja Zarith Sofiah Sultan Idris, consort of the Sultan of Johor and Johor Menteri Besar Datuk Abdul Ghani Othman also took part in the procession which was made up of 88 contingents.
The ceremony was filled with ceramah on the prophet way of life and other religious events.
In KOTA KINABALU, about 15,000 Muslims took part in a state-level celebration which as attended by the Yang Dipertua Negeri, Tun Juhar Mahiruddin and his wife, Toh Puan Norlidah Datuk RM Jasni at the state mosque in Sembulan.
Earlier, Juhar and his wife led a procession involving 98 contingents from various government departments and agencies, the private sector, schools and NGOs from Padang Merdeka to the state mosque.
At the event, former Kota Kinabalu mayor Datuk Abdul Ghani Rashid and Dr Anang Langka Mat Kassim received the Maulidur Rasul awards and took home RM7,000 and a certificate each.
In SARAWAK, the celebration was held at two places, namely at the Al Muhajirin Mosque, Taman Matang Jaya and at the Solahuddin Al-Ayubbi Mosque, Penrissen Camp.
Acting Chief of Staff of the 1st Division Lt. Col. Mustafa Othman led a one-km procession at the camp which was under the Army's First Infantry Division and the Third Brigade.
In PAHANG, the Sultan of Pahang, Sultan Ahmad Shah, accompanied by the Sultanah of Pahang Sultanah Kalsom and the Tengku Mahkota of Pahang, Tengku Abdullah Sultan Ahmad Shah attended the state-level celebration at the Sultan Haji Ahmad Shah Jubilee Hall, Kuantan.
Also present were Menteri Besar Datuk Seri Adnan Yaakob, the Yang Dipertua Dewan Negeri, Datuk Wan Mohamad Razali Wan Mahusin, and State Secretary Datuk Seri Muhammad Safian Ismail.
In PENANG, the Yang Dipertua Negeri, Tun Abdul Rahman Abbas presented the Tokoh Maulidur Rasul award to pensioner Soid@ Shuib Mohd Amin, 68.
In PERAK, the Regent of Perak, Raja Dr Nazrin Shah and the Raja Puan Besar of Perak, Tuanku Zara Salim attended the state-level celebration at the Mara Junior Science Colleges, Felda in Sungkai.
Also present were the Raja Dihilir of Perak, Raja Jaafar Raja Muda Musa, the Raja Puan Muda of Perak, Raja Nor Mahani Raja Shahar Shah, Menteri Besar Datuk Seri Dr Zambry Abdul Kadir and his wife, Datin Seri Saripah Zulkifli, and Perak mufti Tan Sri Harussani Zakaria.
Raja Nazrin presented seven awards, including the Tokoh Keluarga Mithali to Danyal Ghazali, 70, and the Tokoh Pendakwah (preacher) to Dr Anand Shah, 51.
In KEDAH, the state-level celebration, which was held at the Felda Bukit Tembaga Mosque in Pokok Sena was officiated by Tunku Temenggong Tan Sri Tunku Sallehuddin Sultan Badlishah, a member of the Kedah Council of Regency.
At the ceremony, Kedah Zakat secretary Datuk Syeikh Ghazali Yaakob Hashim Salleh and Mashitah Abdul Aziz were name Tokoh Maulidur Rasul.
Meanwhile, the Maulidur Rasul celebration was also held in Jitra and Alor Setar. Kedah Federal Action Council chairman Datuk Mohd Johari Baharom officiated the celebration in Jitra while Kedah Umno liaison committee chairman Datuk Ahmad Bashah Md Hanipah led another gathering in Alor Setar.
The ceremonies were filled with al-Quran recitation, marhaban and ceramah besides the presentation of the Tokoh Maulidur Rasul awards at the parliamentary-level. -- BERNAMA