Bitsig.io and Blockchain.info appear to show everything in UTC. This Gizmodo tweet, screenshotting Spicer, will show up in whatever timezone you set Twitter to

Bitsig.io and Blockchain.info appear to show everything in UTC. This Gizmodo tweet, screenshotting Spicer, will show up in whatever timezone you set Twitter to https://twitter.com/Gizmodo/status/824635801657114624 https://twitter.com/Gizmodo/status/824635801657114624 - you can easily verify it's several hours earlier.