noun
January (new calendar); New Year's period (Gregorian)
Refers to the New Year season according to the Gregorian calendar, as opposed to the traditional lunar New Year (旧正月). Often used in contexts contrasting old and new calendar observances.
新正月には初詣に行く人が多い。
Many people go for hatsumōde (first shrine visit) during the new-calendar New Year.
旧正月ではなく新正月を祝う地域が増えている。
More regions celebrate the new-calendar New Year rather than the lunar New Year.