| Timeline |
| 2360s •2370s • 2380s • 2390s |
| 2400 2400s part of the 25th century • 2406 • 2409
|
| 2410s • 2420s • 2430s • 2440s |
The 2400s was the first decade of the 25th century.
Most notably, beginning in 2400, the Daleks launched a major invasion of the Solar system. It lasted throughout the decade but had ended by 2409 when the Age of Universal Peace began. (PROSE: Break-through! et al.)