Hedera
HBAR
Hedera (HBAR) Calendar: Release Schedule, Listings, Hard Fork, Halving
Consensus Node v.0.68
Hedera will add Dynamic Address Book support (HIP-1299) with the upcoming Consensus Node v.0.68 update in December 2025.
CSM Price Change
Hedera has announced that starting January 2026, the fixed USD fee for the ConsensusSubmitMessage service will increase from $0.0001 to $0.0008.
Mainnet Upgrade
Hedera has scheduled a mainnet upgrade to version v.0.66 on October 8, at 17:00 UTC.
Testnet Upgrade
Hedera will upgrade its testnet to version 0.66 on September 25 at 17:00 UTC.
v.0.65 Mainnet Update
Hedera has announced the upcoming mainnet rollout of version 0.65, set for September 24.
Testnet Upgrade
Hedera plans to upgrade its testnet to version 0.65 on September 4th at 17:00 UTC.
Shut Down Legacy HCS Mirror Node Endpoints
Hedera has issued a final deprecation notice confirming that legacy Hedera Consensus Service (HCS) mirror node endpoints will be permanently shut down on August 20, at 15:00 UTC.
Mainnet Upgrade
Hedera schedules a mainnet upgrade to version 0.64 on August 20 at 17:00 UTC.
Testnet Upgrade
Hedera plans to upgrade its testnet to version 0.64 on August 7th at 17:00 UTC, with an expected duration of approximately 40 minutes during which network disruptions may occur.
Testnet Upgrade
Hedera has scheduled a testnet upgrade to version 0.64 on July 24, at 17:00 UTC. The process is expected to take approximately 40 minutes.
Maintenance
Hedera has announced a scheduled 12-hour brownout of legacy Hedera Consensus Service (HCS) endpoints starting on July 23, at 15:00 UTC.
Mainnet Upgrade
Hedera will upgrade its mainnet to version 0.63 on July 23, at 17:00 UTC.
Testnet Upgrade
Hedera will perform an upgrade of its testnet to version 0.63 on July 10th at 17:00 UTC.
Kraken
Testnet Upgrade
On July 2, at 17:00 UTC, Hedera will upgrade its testnet to version 0.63.
Maintenance
Hedera has announced scheduled maintenance for June 18, at 15:00 UTC, during which legacy Hedera Consensus Service (HCS) mirror node endpoints will undergo a one-hour brownout.
JavaScript SDK Update
Hedera will retire the MyHbarWallet gRPC-Web proxies for mainnet, testnet and previewnet on June 2nd.
Testnet Upgrade
Hedera is scheduled to upgrade its testnet to version 0.61 on April 24th at 17:00 UTC.
Community Call
Hedera will host a community call on April 10th at 14:00 UTC, featuring the HBAR Foundation, Tokeny, iobuilders, and Hashgraph.
