1. The official date on which something begins or starts, typically referring to contracts, projects, employment, or academic ceremonies
The commencement date of the project has been set for January 15th.
A data de início do projeto foi estabelecida para 15 de janeiro.
2. The date of a graduation ceremony or academic convocation
The university's commencement date is scheduled for May 20th.
A data da cerimônia de formatura da universidade está marcada para 20 de maio.