The 2013 season, which was the last before the tour transitioned to a schedule spanning two calendar years, had 40 official-money events in 38 weeks, including three alternate events played the same week as a higher-status tournament. The other event that is considered part of the 2013 season is the biennial Presidents Cup, matching a team of golfers representing the US with an "International" team consisting of non-European players (Europeans instead play in the Ryder Cup, held in even-numbered years).[citation needed]
Invitational: These events are similar to the regular ones, but have a slightly smaller field and do not follow the normal PGA Tour exemption categories. Invitational tournaments include the Charles Schwab Challenge, the Arnold Palmer Invitational, the RBC Heritage, the Memorial Tournament. The tournaments usually have an association with a golf legend, or in the case of the RBC Heritage, a famous course. The table below illustrates some of the notable features of the exemption categories for these events:[65] 

On March 20, 2012, the tour announced radical changes to the tour's season and qualifying process.[66][67] Further details of these changes relating to the Fall Series were announced on June 26,[68] with the remaining details announced on July 10.[69] One of the final details received a minor tweak, effective for the 2013 season only, on September 11.[70]
The number of Race to Dubai points available in the last three events of the season was increased, and the field size reduced. The aim was to make more players still have a chance of winning the Race to Dubai entering the final events. In addition, although the prize money was not increased, the bonus pool of US$5m would now be split among the top five players rather than the top ten. The money saved from restricting field sizes was used solely to increase the first prizes, which means that the tournaments would not have the standard prize fund distribution, and the DP World Tour Championship, Dubai would have the largest tournament first prize in golf of US$3m.[7]
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