um belo dia

Portuguese

Etymology

Literally, “one beautiful day”. This can usually be understood as meaning simply um dia (“one day”), with the word belo (“beautiful”) included as filler text.

Phrase

um belo dia

1. used to introduce a sudden, unexpected change in the course of events

   Eu sempre pensei que nunca seria promovido. Um belo dia, meu chefe me chamou a seu escritório...

   I always thought I would never be promoted. One beautiful day, my boss called me to his office...