the idea behind the cover of past, present and future is this:
The MOERAE represent the three sections that are attributed to Time (present, past, and future): Clotho (‘The Spinner’), the youngest, puts the wool round the spindle, and sings of the things that are; the middle-aged Lachesis (‘The Allotter’) spins it and sings of the things that were; Atropus (‘The Never-turn-back’), the eldest, sings of the things that will be, and cuts the thread when Death arrives.mur228p: Friedrich Paul Thumann 1834-1908: The Three Fates. Alexander S. Murray, Manual of Mythology (1898).
hope that explains why the cover isn't 1D related~