late to the party

a day late and a dollar short

Too late and too feeble to achieve the desired effect.

as of late

Lately; recently.

fashionably late

Arriving behind time to an event which does not normally require one to be punctual.

Gay and hearty

[Cockney slang]a party

Describing how a social get-together should be.

get late

To approach nighttime.

house cooling party

A party to celebrate when a person decides to leave a house or flat, and sometimes to help prepare the space for the incoming residents.

late model

Recently designed or fabricated; new.

let's get the party started

Let's go; let's get this done; let's start more intense action.