Originally set to be held on 27 June 2021, the referendum was indefinitely postponed in early June due to the COVID-19 pandemic. The new date for this referendum will coincide with the presidential and legislative elections on 26 September 2021.

The constitutional referendum would bring a number of proposed changes to the constitution of Haiti, including:

• Abolition of the Senate and creation of a unicameral legislature
• Abolition of the post of Prime Minister (thereby changing from a semi-presidential system to a full presidential system of government)
• Modification of the electoral system for presidential elections, changing from a two-round system to one held in one round under first-past-the-post voting
• Modification of the presidential term limit, allowing two consecutive five-year terms (removing the requirement for a five-year interval before being eligible to serve again for a final term)