3 sentences

1. 这些都是当季的时令蔬菜。

   zhè​xiē dōu shì dāng​jì de shí lìng shū​cài.

   These are all seasonal vegetables.

   Source: Dong Chinese Dictionary

2. 现在牡蛎当季吗？

   xiàn​zài mǔ​lì dāng​jì ma?

   Are oysters in season now?

   Source: Tatoeba

3. 许多时尚名流的穿搭风格会直接影响当季的流行趋势。

   xǔ​duō shí​shàng míng​liú de chuān​dā fēng​gé huì zhí​jiē yǐng​xiǎng dāng​jì de liú​xíng qū​shì.

   The personal styles of many fashion icons directly influence the trends of the season.

   Source: Dong Chinese Dictionary