I stopped messing with the contributions after it became clear how arbitrary and frustrating the feature can be. Not only does it still struggle with time zones

I stopped messing with the contributions after it became clear how arbitrary and frustrating the feature can be. Not only does it still struggle with time zones and branches, when you leave an organization or otherwise lose access to a private repository, all of those contributions disappear from your graph. I have found the concept to work better for me by tracking my streaks using other tools like Habit RPG.