Index - M
| makeTimeOfDayValid | Data.Time.LocalTime, Data.Time | 
| midday | Data.Time.LocalTime, Data.Time | 
| midnight | Data.Time.LocalTime, Data.Time | 
| minutesToTimeZone | Data.Time.LocalTime, Data.Time | 
| MkSystemTime | Data.Time.Clock.System | 
| ModifiedJulianDay | Data.Time.Calendar, Data.Time | 
| ModJulianDate | Data.Time.Clock, Data.Time | 
| Monday | Data.Time.Calendar, Data.Time | 
| mondayStartWeek | Data.Time.Calendar.OrdinalDate | 
| monthAndDayToDayOfYear | Data.Time.Calendar.MonthDay | 
| monthAndDayToDayOfYearValid | Data.Time.Calendar.MonthDay | 
| monthLength | Data.Time.Calendar.MonthDay | 
| months | Data.Time.Format, Data.Time |