We use 'in' when we want to talk about months, seasons and years.
We use 'in' when we want to say what month something happened:
Christmas is IN December.
I usually take my holidays IN August.
We use 'in' with seasons of the year:
I walk a lot IN Summer.
I wear a hat IN Winter.
The leaves fall off the trees IN Autumn.
We also use 'in' when we talk about years:
I was born IN the '80s.
The company began IN 1866.
I moved to Brazil IN 2014.
Watch our video to learn more about the preposition 'in' when you are talking about time.