To create a monthly recurring event on the first Wednesday using the Google Calendar API, the correct recurrence rule (RRULE) should be FREQ=MONTHLY;BYDAY=1WE, where 1WE explicitly indicates the first Wednesday of each month. Your previous attempts either omitted the ordinal indicator (1) or used conflicting parameters like BYMONTHDAY, which may cause the rule to be misinterpreted. The recurrence rule must be passed exactly in the format ['RRULE:FREQ=MONTHLY;BYDAY=1WE'] within the recurrence field of the event definition. This ensures that the API understands the instruction to place the event on the first Wednesday monthly, avoiding unintended weekly patterns or single occurrences.