Glossary · Consensus
Epoch.
A five-day window on Cardano during which staking distribution is fixed.
Think of it as
A five-day pay cycle. Stake snapshots and rewards land on epoch boundaries, never mid-cycle.
In depth
Cardano time is grouped into epochs of 432,000 slots (five days). The staking distribution is snapshotted between epochs, rewards earned in one epoch are paid out two epochs later, and many protocol parameters can only change at epoch boundaries.
Example
You delegate in epoch 500; the snapshot is taken at the end of that epoch, your stake counts toward the pool starting in epoch 502, and the first rewards from blocks it produced with your stake are paid out at the start of epoch 504.