Yes, the time stamp you see is based on YOUR settings. I had a west coast setting, but just changed it to east coast where I live. No change in the time stamp on Marco’s Tweet. Perhaps it doesn’t change past Tweets. That said, I would bet Marco is set to EST and 2:59 is probably when he sent the Tweet. I can’t find a way to verify Marco’s time zone settings. If we can do that, we will know for sure when the Tweet was sent vs when the meeting took place.
If anyone figures out when the Tweet vs the meeting took place, please ping me.
I found a story that led me to this.
http://www.reuters.com/article/us-usa-trump-russia-cyber-idUSKBN15X0OE
That previous story also said that Rubio tweeted after the meeting.