noun which may take the genitive case particle 'no'
monthly; regular monthly
Used before a noun, often with の or in compounds such as 月例会議 and 月例報告, for an event, meeting, report, or practice that occurs every month.
The monthly meeting is held on the first Monday of each month.
午後までに月例報告を提出してください。
Please submit the monthly report by this afternoon.
I attend the monthly meeting at the end of every month.