Online Tool Store
Moon Landing Anniversary Countdown
Moon Landing Anniversary Countdown shows both the landing and the first step, which is why two dates are both correct. Runs entirely in your browser with no.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Date & Time
Moon Landing Anniversary Countdown
Frontend preview — no upload or external service.
Countdown
Apollo 11 touched down at 20:17 UTC on 20 July 1969 and Armstrong stepped onto the surface at 02:56 UTC on 21 July — which is why the date differs by source.
How the Moon Landing Anniversary Countdown works
- Choose the event, noting that the landing and the first step fall on different UTC dates.
- Set your time zone if you want the local moment rather than the UTC one.
- Check the original times shown. Most anniversary confusion comes from sources quoting one event's local date and another's UTC date.
FAQ
Why do sources disagree on the date of the first Moon walk?
Because the landing and the first step happened either side of midnight UTC. The landing was 20 July 1969 and the first step 21 July, and US local time makes both the 20th — which is why both dates circulate.
Which time should an anniversary use?
UTC is the unambiguous reference for a spaceflight event. Local time is what people remember, and for a global anniversary the UTC moment is the one that agrees everywhere.
What other milestones are included?
The Apollo landing missions, the first human spaceflight, and the first orbital flight, all with their documented times. The dates come from mission records rather than commemorative sources.
How we compare
| Feature | Online Tool Store | A calendar app | Mental arithmetic |
|---|---|---|---|
| Exact UTC times | ✓ | Date only | ✓ |
| Explains the date discrepancy | ✓ | ✗ | ✗ |
| No sign-up | ✓ | ✓ | ✗ |
| Nothing uploaded | ✓ | ✓ | ✗ |
Moon Landing Anniversary Countdown shows both the landing and the first step, which is why two dates are both correct.