屆gaai3時si4

English

1. when the time comes
2. at the appointed time; on the occasion (formal than 到時 dou3 si4)
3. at the scheduled time

粵語 — Cantonese

1. 指預期中嘅事發生嘅時候，係「到時」比較正式嘅講法

Examples

• 呢個商場兩年後會起好，屆時會有一萬個工作機會。

  The shopping mall will be completed in two years, and ten thousand jobs will be created by then.