SIMD-0525-1
Slot Time → 350ms
Slot time step 1 of 4: blocks every 350ms instead of 400ms.
Slot Time → 350ms is active on Solana mainnet since epoch 1019 — activated ≈ 2 months ago.
- mainnet
- active since epoch 1019 · ≈ 2 months ago
- testnet
- active since epoch 1000 · ≈ 2 months ago
- devnet
- active since epoch 1115 · ≈ 2 months ago
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The full guideWhat breaks, what to check, and how to prepare →How we know
Solana ships protocol changes behind on-chain switches called feature gates. This page reads the switch itself about every minute — once an activation is requested, it completes at the next epoch boundary, which is where the countdown comes from. No announcements, no invented dates.