Well, time itself may not be. But the way it impacts on our actions, the way we think about it, interpret it, and respond emotionally to it are.
I’m tempted to reflect on which one of these perspectives is the ‘most Christian’ — Zimbardo certainly suggests that a future-orientation goes with a religious disposition. But the thing is, I read Ecclesiastes and it sounds pretty ‘present hedonistic’ according to Zimbardo’s categorisation. I reckon the bigger challenge is figuring out how to be a Christian within the time perspective in which you’ve been enculturated.