Speaking of time and it's relation to the planet spin rate. Clearly time is just time, regardless of spin, but you mention how we've evolved to a specific day. They found a planet around alpha centauri. It's a three star system, and the planet they found is pulled by all three. It's no where near the goldilocks zone, quite bit closer to it's main sun, but it spins so fast that a year is only three days long, but it is earth mass. Life evolving there would have a completely different sense of time.
