Superlative form of timely: most timely.(adjective)
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Use "timeliest" in a sentence
"It was a performance which made even Exeter's coach, Rob Baxter, purr with pleasure, but the timeliest reminder came from the scrum-half who is set to lead a resurgent Scotland team to Twickenham on the penultimate weekend of the championship."
"Beside perhaps Wallace Shawn's brilliant political rants, we do not deal directly with the timeliest and largest scale contemporary American issues."
"And in possibly the timeliest song segue ever, Turner quizzed the crowd: "How many of you here in Baltimore watch 'American Idol'?""