Open your Google Calendar
Click on the date of the event
Type the name of the event
Change the time (if it is at a specific time)
Check the Google Calendar that you want the event attached to
Click Save
Open your Google Calendar
Click on the event you want to edit
Click the pencil
Make changes
Click Save
Open your Google Calendar
Click on the date of the event
Type the name of the event
Change the time (if it is at a specific time)
Click on the 'does not repeat' under the date (beside the clock icon)
Click the dropdown arrow beside 'Does not repeat'
Choose how often you want your event to repeat
Click Save