Jan ‧ u ‧ a ‧ ry /ˈdʒænjuəri, -njʊri $ -njueri/ BrE AmE noun ( plural Januaries ) [uncountable and countable] ( written abbreviation Jan. )
[ Date: 1200-1300 ; Language: Latin ; Origin: Januarius , from Janus ancient Roman god of doors, gates, and new beginnings ]
the first month of the year, between December and February
next/last January
I haven’t heard from him since last January.
in January
She started working there in January.
on January 6th
Rosie’s party was on January 6th.
on 6th January British English :
He took office on 6th January 1999.
January 6 American English :
The package arrived January 6.