1.
first three days of the New Year (January 1-3)
The first three days of January, considered the core of the New Year holiday period in Japan. Most businesses are closed, and families gather for traditional celebrations.
Cultural note
三が日 (January 1-3) is the most important holiday period in Japan. During this time, families visit shrines (初詣), eat traditional New Year dishes (御節料理), and exchange greetings. Most businesses and government offices are closed.
Common collocations
Writing
The が in 三が日 is usually written in hiragana. The word derives from 三箇日 where 箇 is a counter.