Sheikh Mohamed used social media to share some photographs and wish the nation happiness and success.
“Congratulations to my brother Sultan Haitham bin Tariq and all our friends in Oman on the occasion of the country’s 52nd National Day,” Sheikh Mohamed wrote.
“The people of the UAE are your brothers and sisters and we celebrate this day with you. We wish the Sultanate continued happiness and success.”
Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai, also sent his best wishes to the Sultan of Oman and the nation's people. He shared a video online of crowds waving both UAE and Omani flags in front of Burj Khalifa, which was lit up in Oman's colours.
“On the occasion of their fifty-second National Day, we congratulate the sisterly Sultanate of Oman, its leadership, and its people,” wrote Sheikh Mohammed.
“I also congratulate my brother Sultan Haitham bin Tariq, may God protect him, on the blessed renaissance journey he is leading. May God bless Oman's people with goodness and glory and our two peoples with brotherhood, love and co-operation.”
Oman has announced that November 30 and December 1 will be holidays for employees in the public and private sectors to mark National Day.
Celebrations began on Wednesday in the southern Dhofar governorate, with officials attending a march.
Sultan Haitham is expected to attend a military parade in the governorate on Friday, Oman's state news agency reported.