halacha - What is the earliest time one can daven Shacharis?

When is the earliest time you can Daven Shacharis?

Answer

The following are the earliest times, not necessarily lechatechila;

Birchos Hashachar- even in the middle of the night, excepting hanosen lasechvi (machlokes) (if you will return to bed there are other modifications)

Korbanos- amud hashachar (if they mention the actual korbanos, otherwise you can say them before that)

P'sukei d'zimra- amud hashachar

krias shema- should not be said until misheyakir, but bediavad your yotzei from amud hashachar

Birchos Krias Shema- This is a machlokes and should preferably not be said before misheyakir

Tefila- amud hashachar

Bracha on talis- misheyakir

Bracha on tefilin- preferably misheyakir (ask your rav)

When amud hashachar and misheyakir are are debatable, ask your rav.

(If you need ref's for anything, let me know. These are spread out.)