Living in a new time zone.
It doesn't adhere to the usual 24 hours, 7 weeks standard. There's no distinction between days and nights, except that you need to switch on the light when it's dark outside.
It's BFT - baby feeding time!
When baby's awake, you are awake and kept busy. You feed baby, bathe baby, carry baby, sing to baby, entertain baby and change diapers. When all those are completed and baby's falling asleep, you may sneak a moment to update your Facebook or your blog, like what I'm doing right now!
And when baby's asleep, you pump, wash, sterilize, eat, drink, pee, poo, bathe, and occasionally take some photos of your baby's cute sleeping poses... If all of the above have been completed, you finally get to sleep, before baby wakes up and keeps you busy again!