Precisely 55 years ago General Olímpio Mourão Filho (former Integralist intelligence agent) ordered the 4th Infantry Division to march south towards Rio de Janeiro. Forces initially loyal to the government refused to fight their brothers. The 1st Division moved from the city for a clash, but instead joined forces with them. (My father witnessed the moving columns and mentions there was talk of civil war). The 3rd Division considered fighting but gave up. Naval and aviation elements wanted to fight but the loyalist leadership did not want a standoff against the U.S. Navy which was ready to support the insurrection.
High ranking officers intended to act a few days later, but Mourão Filho was hasty. Newspapers ran articles against President Goulart. He fled to Uruguay, and even before he had left the country, the head of the Lower House had temporarily taken over the Executive. Congress then elected Chief of staff Castello Branco as President. The Democratic Revolution of 1964 (or coup, if you wish to call it so) was complete.

Bolsonaro has a glorified view of the events and ordered the Armed Forces to organize celebrations of the events. The military itself never called for anything of the kind and would rather keep quiet, it was the Presidency's initiative. After a lot of controversy and legal objections only some events were held.
Bolsonaro has been accused of attempting to rewrite history. But history is written by the winners and he happens to be the loser: vengeful oppositionists created the current image of what happened back then and Bolsonaro is a nostalgic, frustrated representative of the other side.
I could be called a 64 apologist but not from Bolsonaro's mythicized perspective.
And politically this is a stupid move and needlessly creates friction. He should change the image of the past in more subtle ways.