gaai3 si4屆時届时

Jyutpinggaai3 si4
Yalegaai sìh
副詞Rare

Definition

At the appointed time; by then or when the time comes.

writtentimecommunication

How it's used

Carries a formal, professional tone that makes it suitable for business announcements, news reports, or official invitations. It functions as a direct, more sophisticated substitute for the everyday term 到時. Using it in casual conversation with friends can sound overly stiff or pretentious.

Examples

Will you be attending that meeting at the appointed time?

Related words

Common phrases

attend at the appointed time
announce at the appointed time

Common mistake

Learners often mistakenly use it as a noun to mean 'the time' itself, but it is strictly an adverbial phrase referring to a future point in time. It cannot be used as the subject or object of a sentence.

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector