Upgrade schedule
Where each in-progress upgrade stands — scoping, devnets, testnets, mainnet — with confirmed dates pinned from AllCoreDevs decisions and the rest projected.
Fork Timeline Planning
See the cascading impact of scheduling decisions. Edit a mainnet target or the phase durations and every projected date shifts.
| Milestone | Glamsterdam | Hegotá |
|---|---|---|
| Headliners | ||
| Proposal Deadline | Dec 21, 2025 | Aug 17, 2026 |
| Selection Date | Jan 20, 2026(+30d) | Sep 16, 2026(+30d) |
| Non-headliners | ||
| PFI Deadline | Jan 27, 2026(+7d) | Aug 6, 2026(-41d) |
| CFI Deadline | Feb 26, 2026(+30d) | Oct 23, 2026(+78d) |
| Devnets | ||
| Devnet-0 | Mar 28, 2026(+30d) | Nov 22, 2026(+30d) |
| Devnet-1 | Apr 11, 2026(+14d) | Dec 6, 2026(+14d) |
| Devnet-2 | Apr 25, 2026(+14d) | Dec 20, 2026(+14d) |
| Devnet-3 | May 9, 2026(+14d) | Jan 3, 2027(+14d) |
| Devnet-4 | May 23, 2026(+14d) | Jan 17, 2027(+14d) |
| Devnet-5 | Jun 6, 2026(+14d) | — |
| Devnet-6 | Jun 20, 2026(+14d) | — |
| Devnet-7 | Jul 8, 2026(+18d) | — |
| Testnets | ||
| Sepolia | Aug 3, 2026(+26d) | Feb 16, 2027(+30d) |
| Hoodi | Aug 17, 2026(+14d) | Mar 2, 2027(+14d) |
| Mainnet | ||
| Mainnet | (+30d) | (+30d) |
Hypothetical projections for planning — not commitments. Dates with are confirmed via AllCoreDevs; the rest are projected from the mainnet target and shift as you edit.
Timeline View
Upgrade phases and milestones across forks, on a shared calendar.
Dec 21, 2025
Jan 20, 2026
Jan 27, 2026
Feb 26, 2026
Mar 28, 2026
Apr 11, 2026
Apr 25, 2026
May 9, 2026
May 23, 2026
Jun 6, 2026
Jun 20, 2026
Jul 8, 2026
Aug 3, 2026
Aug 17, 2026
Sep 16, 2026
Aug 17, 2026
Sep 16, 2026
Aug 6, 2026
Oct 23, 2026
Nov 22, 2026
Dec 6, 2026
Dec 20, 2026
Jan 3, 2027
Jan 17, 2027
Feb 16, 2027
Mar 2, 2027
Apr 1, 2027
Per-fork detail
Live scope, progress, and phase breakdown for each in-progress upgrade.
Scoping
Headliners chosen, EIPs proposed and selected for inclusion.
- Headliner proposal deadline2025-12-21
- Headliner selection2026-01-20
- EIP proposal (PFI) deadline2026-01-27
- EIP selection (CFI/SFI) deadline2026-02-26
Development
Client teams implement and iterate across devnets.
Public testnets
NowThe fork runs on Sepolia and Hoodi before mainnet.
- ·Sepolia testnet fork2026-08-03
- ·Hoodi testnet fork2026-08-17
Mainnet
Activation on Ethereum mainnet.
- ·Mainnet activation2026-09-16
Dates with are confirmed via ACD; everything else is projected backwards from the curated mainnet target and shifts as decisions land.
Scoping
NowHeadliners chosen, EIPs proposed and selected for inclusion.
- ·EIP proposal (PFI) deadline2026-08-06
- ·Headliner proposal deadline2026-08-17
- ·Headliner selection2026-09-16
- ·EIP selection (CFI/SFI) deadline2026-10-23
Development
Client teams implement and iterate across devnets.
Public testnets
The fork runs on Sepolia and Hoodi before mainnet.
- ·Sepolia testnet fork2027-02-16
- ·Hoodi testnet fork2027-03-02
Mainnet
Activation on Ethereum mainnet.
- ·Mainnet activation2027-04-01
Dates with are confirmed via ACD; everything else is projected backwards from the curated mainnet target and shifts as decisions land.
Devnets
Live and recent developer test networks for in-progress upgrades.