[] one of the 12 months of the year日历月◆We finalize the accounts on the last day of each calendar month.我们在每个日历月的最后一天结账。a period of time from a particular date in one month to the same date in the next one一整月的时间（从某月某日到下月同一日的期间）◆Payment must be received within one calendar month from date of invoice.从发票出具之日起一月内必须收到付款。