About James Webb Space Telescope Launched
the James Webb Space Telescope launched on Christmas Day 2021, the most powerful space telescope ever built, designed to observe the first galaxies formed after the Big Bang.
Use the live elapsed counter at the top of this page to see exactly how many days, hours, minutes and seconds have passed since 25 December 2021.
Frequently Asked Questions
How many days since the James Webb Space Telescope launched?
The live counter on this page shows the exact number of days since the James Webb Space Telescope launched on 25 December 2021, updating every second.
How many years since the James Webb Space Telescope launched?
The live counter on this page shows the exact years and days since the James Webb Space Telescope launched in 2021. The years figure updates in real time.
How many weeks since the James Webb Space Telescope launched?
The live counter on this page shows the precise number of weeks elapsed since the James Webb Space Telescope launched on 25 December 2021.
What day of the week was the launch of the James Webb Space Telescope?
The launch of the James Webb Space Telescope was on a Saturday, 25 December 2021.
When is the next anniversary of the launch of the James Webb Space Telescope?
The anniversary of the launch of the James Webb Space Telescope falls each year on 25 December. The stats box above shows exactly how many days until the next one.