Portuguese Phrase
Quando é a feira de ciências?
Meaning
A direct question asking for the date or time of the science fair. It is a neutral‑tone inquiry, suitable for both formal and informal contexts.
When to use
Use this sentence when you need to know when a school, community, or university science fair will take place—e.g., during class planning, when coordinating volunteers, or simply out of curiosity.
✦Grammar Breakdown
Quandoéafeiradeciências?
Quando (interrogative adverb)
Used to ask about time or date. It does not change form for gender or number.
é (ser, 3rd person singular)
The verb ser is used for permanent or scheduled events, such as dates and times.
a (definite article)
Matches the feminine singular noun 'feira'.
feira (noun, feminine)
Means 'fair' or 'exhibition'.
de (preposition)
Links two nouns to form a compound noun, similar to 'of' in English.
ciências (noun, plural)
Literally 'sciences'; together with 'feira' it forms the set phrase 'feira de ciências' (science fair).
🗨In Conversation
Quando é a feira de ciências?
When is the science fair?
É no dia 12 de junho, às 10h da manhã.
It’s on June 12th, at 10 a.m.
✕Common Mistakes
Quando está a feira de ciências?
Use 'ser' (é) for scheduled events, not 'estar'.
Quando é a feira de ciência?
The correct term is the plural 'ciências' because the fair covers multiple sciences.
A feira de ciências é quando?
In questions, the interrogative word should stay at the beginning.
↔Alternatives
Qual é a data da feira de ciências?
What is the date of the science fair?
Em que dia será a feira de ciências?
On which day will the science fair be?
Quando vai acontecer a feira de ciências?
When will the science fair happen?
Cultural Tip
In Brazil, school science fairs (feiras de ciências) are usually organized once a year, often in the second semester, and they are a major event for students to showcase projects. The phrase is polite and neutral; you can add "por favor" for extra courtesy, especially when speaking to a teacher or organizer.