How can I train my body to be ok waking early?

[civilfawlty]

So the baby (13mo) has been sleeping through since 7mo. Amazing (and the total opposite of my Dd). But he wakes for the day between 5 and 6. Despite going to bed at 9 every night, I cannot get my body to accept early mornings and I am exhausted. What can I do to teach my body to like early wakings?

You could try a body clock calculator like here: sleeptiming.com/

Which claims to work our the optimal time to fall asleep based on body rhythms?

This too, shall pass! I've been there and already struggle to remember it!