Vedalken Orrery

• WWizards of the Coast2004-12-01
  Official Ruling
  The controller of Vedalken Orrery can cast nonland artifact, creature, enchantment, and sorcery cards any time they could cast an instant. This includes on other players' turns and during the upkeep step, draw step, combat phase, and end step.
• WWizards of the Coast2010-06-15
  Official Ruling
  This applies only to casting spells. It does not, for example, change when you may activate abilities that can only be activated "any time you could cast a sorcery".

Rulings via Scryfall