[txhurl]

The displayed timestamp can be changed at will, just change the timezone your computer is set to.

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So CINC could be signalling to congress ‘I’m waaaay ahead of y’all’

[Cboldt]

My observation is that ANYBODY can change the timestamp as it appears to them. Screenshot it, and voila, "the time is off."

Time of the tweet displayed here is EDT, 8:55 AM - 23 Mar 2018. Pretend to go one hour east by setting your computer as being in the Atlantic Time Zone, and the browser would display the exact same tweet as being posted at 9:55. It's child's play.