Question: When was the this is it tour supposed to start?

context: The 50-concert run was originally slated to start on July 8, 2009 and conclude on February 24, 2010. Each of the shows would have been performed at the O2 Arena in London, which has a capacity of 23,000. New York designer Zaldy was head costumer. Jay Ruckel of La Crasia Gloves recreated Jackson's iconic single glove. The costumes were encrusted with 300,000 Swarovski crystals. In April 2009, thousands of dancers arrived to audition from the 13th to the 15th for Jackson, who helped select the 11 finalists. Kenny Ortega, who had collaborated with Jackson previously, was to work on the overall design and direction of concerts. Ortega said that the final product would have been a "theatrical musical experience". According to Randy Phillips, $20 million was to be spent on producing the concerts, which would have included 18–22 songs and 22 different sets. There also would have been aerial dancing similar to routines by Cirque du Soleil. Carla Ferrigno told Reuters that her husband Lou had been helping Jackson train in advance of the shows. Jackson and Ferrigno had previously worked together.
question: When was the this is it tour originally supposed to start?
short_answers: July 8, 2009
context: No context provided
question: When was the this is it tour supposed to start after the first delay?
short_answers: July 13, 2009

Answer: Michael Jackson's This Is It tour was originally supposed to start at London's O2 Arena on July 8, 2009, and after the first delay, it was supposed to start on July 13, 2009. AEG Live said the delay was necessary because more time was needed for dress rehearsals.