From that day/time forth
Definition 1 of 1
Pro Tip 1/3Starting Point
Use it to mark the beginning of an action or condition that continues. 
She started her blog, and from that day forth, she wrote daily.
Pro Tip 2/3Historical Events
Often used in historical or significant personal contexts. 
After the treaty, from that day forth, the lands were at peace.
Pro Tip 3/3Narrative Changes
Indicates a pivotal change in a story or situation. 
He discovered his talent, and from that day forth, his life took a new direction.