Most landmarks illuminated in 24 hours

- Who
- Smile Train
- What
- 64 total number
- Where
- United States (New York)
- When
- 04 October 2024
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The most landmarks illuminated in 24 hours is 64, and was achieved by Smile Train (USA) in New York, New York, USA, on 4 October 2024.
The attempt spanned North, Central, and South America, the UK, the Philippines, and India.