30th

we celebrated our 30th wedding anniversary last month.

the company is holding its 30th annual conference.

he finished the marathon in 30th place.

it's the 30th of january tomorrow.

our team is in 30th position in the league.

the museum's 30th birthday was marked with a special exhibition.

she turned 30 on the 30th of june.

the 30th floor offers stunning city views.

this is the 30th time i've visited this restaurant.

the project is nearing its 30th milestone.

he's writing a book about the 30th century.