Unfortunately for you, Spike has slept for a month straight once, so strictly speaking no, it wouldn't count. And I can think of no means you have access to that would suffice to keep Twilight unconscious that long without harming her potentially irreversibly. Given that Luna and I do harbor some fondness for Twilight, momentary extreme bouts of social incomprehension or lack of judgement aside... Well, suffice to say the answer is no.