Cardano targets Dijkstra hard fork between December 2026 and March 2027

Key milestones and phased rollout

The Dijkstra rollout follows a two-phase implementation plan. Phase 1 introduces Linear Leios with Nested Transactions, aiming for deployment on the Cardano mainnet by the end of 2026. Phase 2 will introduce Peras, scheduled to activate in a separate intra-era hard fork in the second quarter of 2027.

Intersect, which oversees much of Cardano’s research, development, and governance, stated in a recent update that preparations for the Dijkstra era hard fork are progressing steadily. This work includes efforts in node development, ecosystem readiness, and enhancements to downstream tools.

A series of four major Haskell node releases are set to drive incremental adoption of Dijkstra features. Each release will offer various functionalities, moving Cardano closer to a full-scale era upgrade.

Intersect noted that upcoming node releases will allow the community to test Dijkstra capabilities, with key milestones carefully mapped out in the months ahead.

Upcoming node releases and features

Cardano-node-11.1.1 is scheduled for release by September 7, targeting deployment on the mainnet. This version removes the legacy tracing system and addresses known Genesis issues, aiming to improve performance and stability.

Following shortly after, Cardano-node-11.2 will deliver the core feature set for Dijkstra, enabling broad testing but omitting Leios elements. Leios will remain mainly related to consensus mechanics and block production, meaning node 11.2 will facilitate testing of other Dijkstra components without impacting full consensus operations.

The release candidate for the Dijkstra hard fork, Cardano-node-11.3, is targeted for launch within one to two months. This version will support crossing the hard fork and integrate all core Dijkstra functionalities, including the Leios upgrade.

Cardano-node-12.0 will be the definitive hard fork release. Although its final launch date is yet to be determined, it will mark the full production transition for the Dijkstra era.

Mini dictionary: Intersect is a decentralized membership-based organization that governs Cardano’s development and steers ecosystem strategy. It involves developers, stakeholders, and community members.

Testnet access and governance activity

Developers and community members will have early access to new Dijkstra features on a dedicated public testnet, “DijkstraNet,” following the release of node 11.2. DijkstraNet will run parallel to MusashiNet, a test environment that will continue to support Leios development while DijkstraNet focuses on the broader feature set.

Intersect will also hold two node diversity workshops—one in Singapore during TOKEN2049 on October 6 and another in London on November 13 and 14—to enhance infrastructure readiness and stakeholder engagement.

Governance participants are encouraged to track upcoming Dijkstra-related constitutional amendments, which Intersect will propose publicly.

Dijkstra hard fork timeline and confidence windows

Following a recalibration of the technical delivery timeline, key dates have been provided for the anticipated Dijkstra hard fork. A moderate confidence window estimates mainnet execution between December 5, 2026 and January 4, 2027, while a high confidence window has been set between February 24, 2027 and March 26, 2027.

The Dijkstra era aims to deliver significant new capabilities to Cardano, with the phased rollout offering extensive testing, governance input, and technical preparation before the upgrade goes live.