The best time to post Spring Festival couplets is between 6 am and noon 12 on New Year's Eve. Tear off the old Spring Festival couplets and replace them with new ones, which means to bid farewell to the old and welcome the new.
Before the liberation of China, people in China used to write from right to left, so before the Spring Festival couplets were posted, the first couplet was on the right, the second couplet was on the left, and the horizontal batch was also written from right to left. After liberation, people's cultural habits have changed, and gradually become the posting habits of the first left and the second right!