> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Holocene

> Overview of the Holocene hardfork, introducing dynamic EIP-1559 parameters configurable via SystemConfig and stricter block derivation rules.

## Activation Timestamps

| Network   | Activation timestamp                   |
| --------- | -------------------------------------- |
| `mainnet` | `1736445601` (2025-01-09 18:00:01 UTC) |
| `sepolia` | `1732633200` (2024-11-26 15:00:00 UTC) |

## Execution Layer

* [Dynamic EIP-1559 Parameters](/base-chain/specs/upgrades/holocene/exec-engine#dynamic-eip-1559-parameters)

## Consensus Layer

* [Holocene Derivation](/base-chain/specs/upgrades/holocene/derivation#holocene-derivation)

## Smart Contracts

* [System Config](/base-chain/specs/upgrades/holocene/system-config)