100 days ago is
Friday
October 17, 2025
US Format
10/17/2025
ISO Format
2025-10-17
Day of Year
290
00
days
00
hours
00
min
00
sec
About 100 Days Ago
100 days ago was Friday, October 17, 2025. This was exactly 100 days, or approximately 14.3 weeks, or about 3.3 months before today.
Quick Facts
Past Date
October 17, 2025
Day of Week
Friday
Days Ago
100
Weeks Ago
14.3
Months Ago
3.3
ISO Date
2025-10-17
Common Uses for 100 Days Ago
- Historical date reference
- Past event tracking
- Record keeping
Looking for a future date instead? See 100 days from today