late winter
Refers to the latter part of winter, roughly February in the modern calendar. Used both as a noun and adverbially.
The cold of late winter is still severe.
twelfth month of the lunar calendar
Obsolete term for the twelfth month of the old lunar calendar, corresponding roughly to modern January. Cross-referenced with 師走.
See also: 師走
晩冬にこの花が咲く。
This flower blooms in late winter.
In the old calendar, 晩冬 corresponds to the twelfth month (師走).