All Cooperative rate schedules for electric service are based on one month's service. One month's service covers approximately a 30 day period, not necessarily a calendar month.
For efficiency, the Cooperative may read meters and mail bills throughout the month. Meter reading and billing may be divided into segments called "cycles". Consumers are billed monthly, and where they live will determine when the meter is read and the bill is mailed. This should be generally about the same date each month.