• Goodbye Arizona


  • Not bad Arizona, not bad.


  • We spent 2 nights in Las Vegas and I’m honestly surprised that I unironically loved it here.


  • In-N-Out Burger is good. The hype is real.


  • howisfelix.today

    Back in 2019, I started collecting all kinds of metrics about my life. Every single day for the last 2.5 years I tracked over 100 different data types – ranging from fitness & nutrition to social life, computer usage and weather.

    I want to start digging into the code as I tried collecting all different data points before. My main issue has been easy manual data entry.


  • I saw the place where macOS wallpapers are born.

    Not sure what photos I’m taking there with that background.


  • We had to stop in Cupertino beforehand, of course.


  • Driving California 140 was an experience in itself. Can’t wait for Yosemite tomorrow.


  • Your Calendrical Fallacy Is…

    Helping you navigate the insane complexity of calendrically correct date and time operations

    Every software engineer knows working with dates and time is inherently complex. Still, we all implemented an unchecked assumption because it is always like this for “me”.


  • Going full-tourist in San Francisco


  • Good to be back in SF


  • Constructor Theory - constructortheory.org

    Constructor Theory:

    Constructor Theory is a new approach to formulating fundamental laws in physics. Instead of describing the world in terms of trajectories, initial conditions and dynamical laws, in constructor theory laws are about which physical transformations are possible and which are impossible, and why.


  • Old fire truck in Berlin



  • 🍣 Sushi