4 sentences

1. 春节是农历正月初一。

   Chūn​jié shì nóng​lì Zhēng​yuè chū​yī.

   Spring Festival is the first day of the first lunar month.

   Source: Dong Chinese Dictionary

2. 正月初一，晚辈们纷纷向长辈贺岁。

   Zhēng​yuè chū​yī, wǎn​bèi men fēn​fēn xiàng zhǎng​bèi hè​suì.

   On the first day of the Lunar New Year, the younger generation offers New Year greetings to their elders.

   Source: Dong Chinese Dictionary

3. 正月初一这一天，家家户户都要放鞭炮庆贺。

   zhēng yuè chū​yī zhè yī tiān, jiā​jiā​hù​hù dōu yào fàng biān​pào qìng​hè.

   On the first day of the first lunar month, every household sets off firecrackers to celebrate.

   Source: Dong Chinese Dictionary

4. 每年正月初一，家里人都会聚在一起吃团圆饭。

   měi nián Zhēng​yuè chū yī, jiā​lǐ​rén dōu huì jù zài yī​qǐ chī tuán​yuán​fàn.

   Every year on the first day of the first lunar month, the family gathers for a reunion dinner.

   Source: Dong Chinese Dictionary