Upgrade schedule
Where each in-progress upgrade stands across scoping, devnets, testnets, and mainnet, with confirmed dates pinned from AllCoreDevs decisions and projections for remaining milestones.
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 25, 2025 | Oct 4, 2026 |
| Selection Date | Jan 24, 2026(+30d) | Nov 3, 2026(+30d) |
| Non-headliners | ||
| PFI Deadline | Jan 31, 2026(+7d) | Aug 6, 2026(-89d) |
| CFI Deadline | Mar 2, 2026(+30d) | Dec 10, 2026(+126d) |
| Devnets | ||
| Devnet-0 | Apr 1, 2026(+30d) | Jan 9, 2027(+30d) |
| Devnet-1 | Apr 15, 2026(+14d) | Jan 23, 2027(+14d) |
| Devnet-2 | Apr 29, 2026(+14d) | Feb 6, 2027(+14d) |
| Devnet-3 | May 13, 2026(+14d) | Feb 20, 2027(+14d) |
| Devnet-4 | May 27, 2026(+14d) | Mar 6, 2027(+14d) |
| Devnet-5 | Jun 10, 2026(+14d) | — |
| Devnet-6 | Jun 24, 2026(+14d) | — |
| Devnet-7 | Jul 8, 2026(+14d) | — |
| Devnet-8 | Aug 12, 2026(+35d) | — |
| Testnets | ||
| Sepolia | Sep 21, 2026(+40d) | Apr 5, 2027(+30d) |
| Hoodi | Oct 5, 2026(+14d) | Apr 19, 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 25, 2025
Jan 24, 2026
Jan 31, 2026
Mar 2, 2026
Apr 1, 2026
Apr 15, 2026
Apr 29, 2026
May 13, 2026
May 27, 2026
Jun 10, 2026
Jun 24, 2026
Jul 8, 2026
Aug 12, 2026
Sep 21, 2026
Oct 5, 2026
Nov 4, 2026
Oct 4, 2026
Nov 3, 2026
Aug 6, 2026
Dec 10, 2026
Jan 9, 2027
Jan 23, 2027
Feb 6, 2027
Feb 20, 2027
Mar 6, 2027
Apr 5, 2027
Apr 19, 2027
May 19, 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 deadline2025-12-25
- Headliner selection2026-01-24
- EIP proposal (PFI) deadline2026-01-31
- EIP selection (CFI/SFI) deadline2026-03-02
Development
Client teams implement and iterate across devnets.
Public testnets
NowThe fork runs on Sepolia and Hoodi before mainnet.
- ·Sepolia testnet fork2026-09-21
- ·Hoodi testnet fork2026-10-05
Mainnet
Activation on Ethereum mainnet.
- ·Mainnet activation2026-11-04
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 deadline2026-10-04
- ·Headliner selection2026-11-03
- ·EIP selection (CFI/SFI) deadline2026-12-10
Development
Client teams implement and iterate across devnets.
Public testnets
The fork runs on Sepolia and Hoodi before mainnet.
- ·Sepolia testnet fork2027-04-05
- ·Hoodi testnet fork2027-04-19
Mainnet
Activation on Ethereum mainnet.
- ·Mainnet activation2027-05-19
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.