| center_interval | Shift to the middle of each interval |
| closest_weekday | Retrieve the closest given weekday |
| coffee | Coffee Data Set |
| emergency | Emergency Calls for Montgomery County, PA |
| fill_by_function | Fill missing values by a function of the nonmissings |
| fill_by_prevalent | Fill missing values by the most prevalent nonmissing value |
| fill_by_value | Fill missing values by a single value |
| format_interval | Make a period character vector |
| get_interval | Get the interval of a datetime variable |
| pad | Pad the datetime column of a data frame |
| pad_cust | Pad with a custom spanning |
| pad_int | Pad the integer column of a data frame |
| span_around | Span an equally spaced vector around a datetime variable |
| span_date | Wrapper around 'seq.Date'. |
| span_time | Wrapper around 'seq.POSIXct'. |
| subset_span | Subset a spanned datetime vector |
| thicken | Add a variable of a higher interval to a data frame |
| thicken_cust | Thicken with a custom spanning |