Use 'thirtieth' to specify the exact position in a sequence, like dates or rankings.

Series Position

'Thirtieth' is often used to mark significant occasions or achievements that involve the number 30.

Milestone Celebration

Understand that 'thirtieth' is an ordinal number, denoting order, unlike 'thirty', which is cardinal.

Ordinal Usage

Use 'thirtieth' to describe a small, exact portion out of 30 equal parts of a whole.

Fractional Share

When something is divided into 30 parts, describing one part as 'thirtieth' emphasizes its small size.

Small Proportion

Use 'thirtieth' when you need to convey precise divisions, such as in financial or legal contexts.

Exact Division

 They're also extremely fuel efficient. To bring a pound of mussels to market is about a thirtieth of the carbon as required to bring beef to market. They require no forage fish, they actually get their omega-3s by filtering the water of microalgae.

The four fish we're...

 sandalwood for passion it's April thirtieth tomorrow which is all over England celebrate what they call the first day of summer Beltane as High Priestess of the Raven and the rose