Hedera
HBAR
Hedera (HBAR) Calendar: Release Schedule, Listings, Hard Fork, Halving
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.
Testnet Upgrade
Hedera plans to upgrade its testnet to version 0.65 on August 28th 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.
Testnet Upgrade
Hedera will upgrade its testnet to version 0.60 on April 8th at 17:00 UTC.
Paris Blockchain Week in Paris
Eric Piscini, CEO of Hashgraph, will deliver a keynote titled “Enterprise Blockchain: The Future is Hybrid” at Paris Blockchain Week on April 8, from 13:20 to 13:40 UTC at the Mona Lisa Stage.
HashSphere Launch
Hedera has introduced HashSphere, a private, permissioned network designed for enterprise use.
Community Call
Hedera will host a community call on X, featuring discussions with Hashgraph and SEALCOIN on March 27th at 16:00 UTC.
