it's all Greek to me

all it's cracked up to be

As good as claims or reputation would suggest.

Bubble

[Cockney slang]Greek

via Bubble & Squeak

Greek calends

A time that never occurs; never; when pigs fly.

if it's all the same

If it makes no difference; if nobody minds; if it doesn't bother anyone.

it's about time

Used to express impatience at the eventual occurrence of something that the speaker or writer has deemed to be long overdue.

it's all good

Used to express unconcern.

it's early days

Indicating it is too soon to know the outcome of a situation, often implying it is too early to make a judgment or prediction.

it's five o'clock somewhere

Used as an excuse for drinking alcoholic beverages outside of customary hours.