Core types | Creating a datey | When in the day? | From year, month and day | From base R dates | From fractional years or text | Properties of a datey | Creating a durationy | Comparisons and arithmetic | datey_interval -- representing a time period | Interval membership testing | Interval properties | Intersection | NA values | Sequences and statistics

Calculating per annum rates from date input data | An annual grid of clicks | Fractions of a day | Interval algebra for time periods | What datey is not for

Introduction | Definitions | The fixed precision annual grid | Types | Dates | Durations | Mapping years to a datey or durationy | Mapping a date to a datey | Mapping a datey to a date and day-fraction | Arithmetic and comparative operations | Pure datey and duration operations | Mixed datey / durationy and numeric operations | Text representations | datey text format | durationy text format