MD1 introduces a new recurring event picker. Tap on the small arrow after "One-time event" to access it.
The default screen is the repeat weekly screen. You cap tap on weekly to choose between: never(one time event), daily, weekly, monthly and yearly.
Tap on where it says every x week(s) to create events that repeat every x days, weeks, months, etc. For example, choose every 2 weeks to create a bi-weekly event.
You can select multiple days of the weeks for your repeating events now. So for example: Tuesdays, Thursdays, and Sundays, but only every other week.
Lastly you can decide when to end the repetition rule: Forever, until a date, or after a number of events have run. Remember that if you have selected multiple days of the week that each individual day will count as 1 event.