Hedera will be upgrading the Testnet to v0.13.0 (release notes: https://docs.hedera.com/guides/docs/release-notes/services
) on Thursday, April 22nd 2021 at 18:00 UTC. The upgrade will take approximately 2 hours to complete, during which time all network services on the Hedera Testnet will be offline. Please note the upcoming account creation fee changes at https://hedera.com/blog/account-creation-fee-increase-and-fee-change-processes
This upgrade should not affect your project’s compatibility or data. As a precaution, we always recommend preserving project data prior to any Testnet upgrade.