2 sentences

1. 全校师生欢聚一堂，共庆佳节。

   quán xiào shī​shēng huān​jù​yī​táng, gòng qìng jiā​jié.

   All the teachers and students of the school gathered to celebrate the holiday.

   Source: Dong Chinese Dictionary

2. 信徒们欢聚一堂，庆祝救世主的降生。

   xìn​tú men huān​jù​yī​táng, qìng​zhù Jiù​shì​zhǔ de jiàng​shēng.

   The believers gathered together to celebrate the birth of the Savior.

   Source: Dong Chinese Dictionary