Maybe useful in some cases, but this calendar has a heading saying the lessons are "every other week" so you don't have to make 13 calendar entries. It takes a

Maybe useful in some cases, but this calendar has a heading saying the lessons are "every other week" so you don't have to make 13 calendar entries. It takes a few seconds but you can make a calendar entry on September 13, tell your calendar app that it repeats every two weeks, and then you delete the six "vacation" slots. This is much faster.