Flexibits has introduced Fantastical 2.1 (http://flexibits.com/fantastical) for Mac OS X. It’s the first major update for the calendar app and is compatible with El Capitan, due for a Sept. 30 release.
Fantastical 2 for Mac is available now for a limited-time sale price of US$39.99 from the Mac App Store or directly from the Flexibits Store. The standard price will be $49.99 after a few weeks. Fantastical requires OS X Yosemite 10.10 or OS X El Capitan 10.11.