It could be over a few months, like a new job where one day you feel like actually going to work thinking, hey I actually like these people and don’t mind working here.
Or when your friends have been super busy for months and suddenly you get matched on dating apps, old friends reach out and people want to buy your old junk on Craigslist in a single day.
Many times. Although often it didn’t happen unexpectedly, but built up for a few days or weeks before it “clicked”.
Most impactful: becoming vegan.
Also impactful, but weird:
Many other smaller things that build towards quality of life and quality social interactions.
All of these things built up during meditation sessions before I took a conscious decision that I acted upon.