"First night" may also refer to a wedding night

First Night is an artistic and cultural celebration on New Year's Eve, taking place from afternoon until midnight. Some cities have all their events during the celebration outside, but some cities have events that are hosted indoors by organizations in the city, such as churches and theaters. Since it happens on New Year's Eve, First Night celebrations are actually held on the last night of the old year. The real first night occurs on New Year's Day. First Night celebrates a community's local culture, often featuring music, dance, comedy, art, fireworks and, in some cities, ice sculptures and parades.