# Cardano (ADA) Enters Epoch 667 After Epoch 666 Ended Nov. 10

By Simon Yoon

Canonical URL: https://www.tokenpost.com/news/technology/55452
Published: 2026-11-12T13:45:37.000Z
Updated: 2026-11-12T13:45:37.000Z
Section: Technology

> Each Cardano epoch lasts five days.

The Cardano network entered Epoch 667 after Epoch 666 ended Nov. 10, and Midnight upgraded its mainnet to Ledger 9.

Cardano organizes activity in five-day epochs, each containing 432,000 one-second slots. The periods structure operations such as transaction processing, rewards and staking.

The number 666 drew attention for its biblical association, but its completion was part of the network’s routine operating cycle. Epoch 667 is expected to end Nov. 15.

Midnight had surpassed 1.7 million transactions.