| makeTimeOfDayValid | Data.Time.LocalTime, Data.Time |
| March | Data.Time.Calendar.MonthDay, Data.Time.Calendar.Julian, Data.Time.Calendar, Data.Time |
| May | Data.Time.Calendar.MonthDay, Data.Time.Calendar.Julian, Data.Time.Calendar, Data.Time |
| midday | Data.Time.LocalTime, Data.Time |
| midnight | Data.Time.LocalTime, Data.Time |
| minutesToTimeZone | Data.Time.LocalTime, Data.Time |
| MkFormat | Data.Time.Format.Internal |
| MkMonth | Data.Time.Calendar.Month |
| MkQuarter | Data.Time.Calendar.Quarter |
| MkSystemTime | Data.Time.Clock.System |
| ModifiedJulianDay | Data.Time.Calendar, Data.Time |
| ModJulianDate | Data.Time.Clock, Data.Time |
| Monday | Data.Time.Calendar.WeekDate, Data.Time.Calendar, Data.Time |
| mondayStartWeek | Data.Time.Calendar.OrdinalDate |
| Month | Data.Time.Calendar.Month |
| monthAndDayToDayOfYear | Data.Time.Calendar.MonthDay |
| monthAndDayToDayOfYearValid | Data.Time.Calendar.MonthDay |
| MonthDay | Data.Time.Calendar.Month |
| monthLength | Data.Time.Calendar.MonthDay |
| MonthOfYear | Data.Time.Calendar.MonthDay, Data.Time.Calendar.Julian, Data.Time.Calendar, Data.Time |
| monthOfYearQuarter | Data.Time.Calendar.Quarter |
| monthQuarter | Data.Time.Calendar.Quarter |
| months | Data.Time.Format, Data.Time |