2 sentences

1. 他的具体归期还不定。

   tā de jù​tǐ guī​qī hái bù​dìng.

   His exact return date is still undecided.

   Source: Dong Chinese Dictionary

2. 我已决定推迟归期。

   wǒ yǐ jué​dìng tuī​chí guī​qī.

   I have decided to postpone my return.

   Source: OpenSubtitles