datey-package: Exact date and duration arithmetic on an annual grid

In datey: Exact Date and Duration Arithmetic on an Annual Grid

Exact date and duration arithmetic on an annual grid

Description

The datey package provides three types for date and duration arithmetic on an annual grid:

• datey — a point in time, expressed as a calendar date with an optional day fraction.

• durationy — a duration in years.

• datey_interval — a closed-open interval [start, end) of time.

Arithmetic, comparison and summary operations are defined in ops, mean.datey and max_min.

Author(s)

Maintainer: Tim Gordon [e-mail] (ORCID)

Authors:

• Tim Gordon [e-mail] (ORCID)

See Also

• datey, durationy, datey_interval for the core types.

• ops for arithmetic and comparison operators.

• is_NA and NAs for handling missing values.

• vignette("datey") for a worked introduction.

• vignette("why-datey") for the motivation and design of the annual grid.

datey documentation built on July 14, 2026, 5:06 p.m.