Index - M
| makeTimeOfDayValid | Data.Time.Ext |
| MatchAlgo | Model |
| MaybeStep | Model |
| midday | Data.Time.Ext |
| midnight | Data.Time.Ext |
| minutesToTimeZone | Data.Time.Ext |
| ModifiedJulianDay | Data.Time.Ext |
| ModJulianDate | Data.Time.Ext |
| Monday | Data.Time.Ext |
| months | Data.Time.Ext |