Look at the schedule and nothing radically different jumps out at you: It begins in Hawaii the first week of January, and ends at the Tour Championship in late September. It's what happens next that represents the change.
Because the Fall Finish will no longer "finish" the season - instead, the fall tournaments will begin the following season. After the 2013 season concludes, the 2014 PGA Tour season will almost immediately begin - in October. The 2013 schedule is the PGA Tour's transition from a January-through-December schedule to an October-through-September schedule.
That's why the Mayakoba Classic doesn't appear on the 2013 schedule. That event is moving to a fall date, and will be part of the early 2014 season. Likewise, tournaments such as the Frys.com Open and HSBC Champions don't show up on the 2013 schedule because they have late-year dates and so will be part of the 2014 schedule rather than 2013 schedule.
And the major championships in 2013? Here are those dates:
- The Masters, April 11-14
- U.S. Open, June 13-16
- British Open, July 18-21
- PGA Championship, Aug. 8-11