# Epochs

The length of a postmint campaign is scheduled in epochs, with one epoch set to 7 days. Currently, all campaigns run for at least one epoch. PostToEarn campaigns are scored at the end of each epoch, and shortly afterwards, the campaign rewards are made available via the campaign creator. While the campaign creator specifies the initial number of campaign epochs, additional epochs can be added at any point to extend the campaign duration. For the time being, a new epoch always starts after the last epoch ends. We recommend creating a new campaign if the last epoch expired a while ago.
