What is a calendar quarter in Missouri? For instance, are they January - March, April - June, July - September, and October - December? Or something else? If so, can you explain? Also what is the base period? I'm trying to determine my monetary eligibility based on the criteria you have listed: Make at least $2,250—at least $1,500 during one of the calendar quarters, and at least $750 during the remainder of the base period—from an insured employer during your base period AND your total base period wages must be at least 1.5 times your highest quarter wages. OR you must make at least $19,500 during two of the four base period quarters. I have not yet earned $19,500 and I doubt I will earn this amount in Missouri this year. I started working in Missouri beginning March 1st and by the end of this month I will have earned $5,000 gross. I work for an employer as a part-time employee who pays into the UI system.