Brazil's Official Rules for Time
While many countries use varied formats, Brazil follows a rigid national standard for tracking time. By law, they use the 24-hour clock for formal settings, turning our common calendar into a strictly regulated system.
Brazil manages its time and dates through a specific technical standard known as NBR 5892. This rule dictates that dates must be written in a day-month-year order, with months always spelled out in lowercase letters. While residents often switch to a 12-hour clock in casual conversation, official documents strictly stick to the 24-hour format. It is a fascinating example of how a government can standardize even the smallest details of daily communication.
Source: Date and time notation in Brazil