Specifying a calendar
You can specify which calendar you'd like to add an event to by typing a slash (/) followed by the calendar's name at the beginning or end of your sentence. For example, /h would switch to your calendar named Home and /w would switch to your Work calendar, etc. If you have more than one calendar that starts with the same letter, the next letter in the name that is different will be used to differentiate the calendar name.
Events with locations
Fantastical will automatically look for locations in the sentences you enter. For example, "Fishing trip at the lake on July 25th" will consider "the lake" as the location for the event. If you'd rather the event be named "Fishing trip at the lake," click the clear button next to the location field.

Inviting people to events
Fantastical will search your Address Book when it looks like you're trying to invite someone to an event. For example, typing "Lunch with Matthew tomorrow" will highlight Matthew, allowing you to quickly invite Matthew to the event.

Examples
Here are some sentences you might enter while using Fantastical: