Index - D
| Day | Data.Thyme.Calendar, Data.Thyme |
| dayFraction | Data.Thyme.LocalTime, Data.Thyme |
| dayFractionToTimeOfDay | Data.Thyme.Time |
| DayOfMonth | Data.Thyme.Calendar.MonthDay, Data.Thyme.Calendar, Data.Thyme |
| DayOfWeek | Data.Thyme.Calendar.WeekDate |
| DayOfYear | Data.Thyme.Calendar.OrdinalDate |
| dayOfYearToMonthAndDay | Data.Thyme.Time |
| Days | Data.Thyme.Calendar, Data.Thyme |
| diffAbsoluteTime | Data.Thyme.Time |
| diffDays | Data.Thyme.Time |
| DiffTime | Data.Thyme.Clock, Data.Thyme |
| diffUTCTime | Data.Thyme.Time |