In January, it's time for shinnenkai, parties to celebrate the start of the new year, often with the same group of people you had bonenkai with.
1月は、一年の始まりを祝う新年会の時期だ、忘年会で一緒だった人たちと同じグループで開催される。
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?
Memorize