HM King Maha Vajiralongkorn ascended the throne following his father's passing in October 2016, which ended a tumultuous seven-decade reign over the Southeast Asian kingdom.
In a televised announcement the Royal Household Bureau said the coronation will take place in early May.
"It's suitable time to hold the coronation in accordance to the tradition and for national celebration and joy of the people," the bureau said.
The "coronation ceremony" will be held on May 4 with an audience granted to "the royal family, privy councillors and cabinet members", it explained.
The following day a ceremony will "bestow the royal name" according to traditions governing the monarchy, then on May 6 the king will hold a "grand audience" with members of the public and diplomats.