In all my born days
Definition 1 of 1
Pro Tip 1/3Expressing Amazement
Use the phrase when something is so surprising, it's unlike anything you've experienced before. 
In all my born days, I hadn't seen such an innovative solution.
Pro Tip 2/3Emphasizing Rarity
Highlight how rare or uncommon an event or experience is in your life. 
I've hardly heard such a strange noise in all my born days.
Pro Tip 3/3Slightly Archaic
It's an older phrase, so it might sound quaint or outdated in everyday modern conversation. 
In all my born days, I've never witnessed such old-fashioned manners.