Eliud Kipchoge's INEOS 1:59 Challenge will be held on Saturday in Vienna, the organisers announced on Wednesday.
The official start time of the race will be confirmed on Friday, but it will be between 6am and 10am on Saturday.
Kenyan long distance legend will be seeking to become the first athlete to run the marathon below 2 hours.
Kipchoge, 34, made his first attempt during the Monza Nike Breaking2 in Monza, Italy on May 6, 2017 where he came short by 26 seconds, clocking 2:00:25.
Harambee Stars captain Victor Wanyama, who features for Tottenham Hotspur in the English Premier League, tweeted in support of Kipchoge.
“Let me take this earliest opportunity to wish my friend and countryman @EliudKipchoge the best in the @INEOS159 in Vienna Austria this weekend. I believe you in your capability will run that marathon in 1:59 bro,” tweeted Wanyama.