anniversary
noun
ˌænɪəˈvɜːsəri
noun
1
a
date
on
which
something
special
or
important
happened
in
a
previous
year
周年纪念（日）
Jack
and
Kim
celebrated
their
twentieth
wedding
anniversary
in
January.
1 月，杰克和金庆祝了他们 20 周年结婚纪念日。
[+
of
]
A
huge
parade
was
held
on
the
anniversary
of
the
1959
revolution.
1959 年革命纪念日那天举行了大规模游行活动。