Single Line Calendar Event Standard?

I'm developing a to do list app, and I want each task to be editable on one line (because as a developer I don't own a mouse :P ).

I was wondering if there was an established standard for single-line calendar events?

I know Ical exists, but i don't want to have to create an entire ical entry when i want to flag a task to happen in a day.

Currently I have a current system like this:

- Listen to music \{date: +1m} - in one minute

- Code new feature \{date: +1d} - in one day

- Wake up \{date: 9:00am} - next 9:00am

- Go for a run \{date: (9:00am)} - every 9:00am

Does anyone know of any standards like this?