There is a Legacy version here.


Source GM Core pg. 172
Time still passes, but the effects of time are diminished. Creatures on these planes don’t feel hunger, thirst, or the effects of aging or natural healing. The effects of poison, diseases, and other kinds of healing might also be diminished on certain timeless planes. Spell energy and other effects still dissipate, so the durations of spells and other effects function as normal. The danger of this trait is that when a creature leaves a timeless plane and enters a plane with another time trait, the effects of hunger, thirst, aging, and other effects slowed or arrested by the timeless trait occur retroactively in the instant of transition, possibly causing the creature to immediately starve or die of old age.