Or to be even more picky, the use of a hyphen is only appropriate when a non-adjective forms part of a compound adjective. The normal but less readable way of denoting two or more adjectives is to use a comma between adjectives. This example, using non-adjectives in the mix, shows where a hyphen is required, where a comma is required and where neither is required (where an adverb describes the adjective):

Really picky, showing-the-commas, daylight-saving time.

-S