You can add an event directly from a Google search page or your browsers omnibox. First, make sure your logged into gmail. Preface your event information with “make an appointment to” than add your appointment details such as “lunch with Joe from 1 to 2 tomorrow”. Enter that into Google search, & at the top of your search results will be a “Create Event” box with your event details. Click that button to add your event to Google Calendar.