Year 1997

1943

Year 1949

One year

once a year, annually

within a year [written and colloquial]

a year and a half

a year and a half

all year round

more than a year

annual

Grade one; Primary one

during a year

more than one hundred and fifty years [written and colloquial]

the 1970s

around seventy years

three years

to have an unexpectedly huge upturn / win after a long period of downturn [colloquial]

first half of the year

last year

Second half of the year

next year

the years where one can make wiser decisions, which usually refers to decade commencing when one reaches 40 years old

middle-aged

middle-aged people

middle-aged and elderly people

year 1997

the year 1998

during the 90s (era)

many years later