🇪🇬 Cairo, Egypt

4:20 in Cairo

It's always 4:20 somewhere.

Cairo's next 4:20

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Checking your clock

🕰️ Time machine

Can't wait? Skip ahead and see what each city's 4:20 looks like.

Professor High's 4:20 in Cairo. AI art made with GPT Image 2.6 by OpenAI. See every city

Cairo 4:20 lock screen with Professor High
Cairo lock screen, showing the time in Cairo
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Live 3D globe

Watch 4:20 travel around the world

The gold wave is 4:20 moving zone by zone. Drag to spin the globe, tap a city, or play the next 24 hours.

Live now

  • Gold: 4:20 right now
  • Warming up: 4:20 within the hour
  • A city on the clock
  • Night side

--:-- your time · --:-- UTC

Professor High, live from the clock

Every minute, a different clock gets its turn.

Next up around the world

Every city has its own 4:20 scene. Tap a picture to see it full screen, or skip ahead to its 4:20.

Put the 4:20 clock on your lock screen.

The High IQ 4:20 widget counts down to the next city on Earth to hit 4:20, on your iPhone home screen or lock screen. It's somewhere, and now you'll know where.

High IQ is the app for adults who want to understand their own cannabis: note how each session felt, watch your taste profile build up, and ask Professor High anything. A daily 4:20 reminder from Professor High is on the way.

See the High IQ app

For adults 21+ where cannabis is legal.

Why 4:20?

The popular story starts in 1971 at San Rafael High School in California. A group of friends agreed to meet at 4:20 PM by a statue of Louis Pasteur. The meeting time became a code word, then a worldwide tradition. Because the clock reads 4:20 twice a day in every time zone, it is 4:20 somewhere on Earth every hour.

113 cities, 113 different 4:20s

Professor High keeps 4:20 in every one. Pick a city to watch its clock.