7 days

=

1 week

15 days

=

1 fortnight

30/31 days

=

1 month

365 days

=

1 year

366 days

=

1 leap year

12 months

=

1 year

1 year

=

Anniversary

10 years

=

1 decade

25 years

=

Silver jubilee

50 years

=

Golden jubilee

60 years

=

Diamond jubilee

75 years

=

Platinum jubilee

100 years

=

century