On this day in Westeros, the following occured:
(299 AC) Daenerys VIII, AGOT: Drogo falls from his horse. Dany summons Mirri Maz Duur to perform a spell to save his life, before going into labor herself.

(299 AC) Catelyn X, AGOT: Battle of the Whispering Wood occurs at night.

Additionally, I forgot to do this post yesterday, so here's what happened on Eighth, First Moon as well:

(300 AC) Jaime VII, ASOS: Jaime arrives at King’s Landing.

(300 AC) Arya XII, ASOS: Arya reaches a town in the foothills of the Mountains of the Moon. That night she wargs into Nymeria to pull Catelyn’s body out of the Trident.

This series will include everything for which we have a definitive or speculative date, up to and including sample chapters from TWOW.

Speculative dates are sourced from this spreadsheet by u/PrivateMajor:ASOIAF Timeline - Vandal Proof