Changes in version 1.7.0.9000 Changes in version 1.7.0 (2026-02-05) New classes and methods - Add flip() to permute dimensions of a TimeSeries. Changes in version 1.6.0 (2025-10-01) New classes and methods - Add graph_create() to compute an interval or a stratigraphic graph. - Add graph_prune() to remove redundant relations from a graph. - Add a format() method for TimeIntervals objects. - Add names() and names()<- methods for TimeIntervals objects. - Add precedes(), preceded_by(), meets(), met_by(), overlaps(), overlapped_by(), finishes(), finished_by(), contains(), during() starts(), started_by() and equals() to test for logical relation between time intervals. Changes in version 1.5.0 (2025-04-29) Enhancements - The plot() method for TimeIntervals gained a new groups argument. Breaking changes - Remove as_graph(). Internals - Use an internal package environment instead of options to set the default calendar. Changes in version 1.4.0 (2025-02-27) New classes and methods - Add as_graph() to compute an interval graph. - Add get_calendar() and set_calendar() to get and set the default calendar. Changes in version 1.3.0 (2024-12-10) New classes and methods - Add calendar_year() to get the average length of the year of a calendar (in solar days). Enhancements - Improve French translation. Changes in version 1.2.0 (2024-11-13) Enhancements - Translate into French. Bugfixes & changes - Remove year zero ticks in plots (Julian calendar). Internals - Epochs of the Gregorian era are no longer represented as subclasses, but as instances of the GregorianCalendar class. Changes in version 1.1.0 (2024-10-04) New classes and methods - Add support for time intervals. Bugfixes & changes - Fix a bug in span(): if a calendar was specified, the result was shifted according to the calendar's epoch (dates were returned instead of durations). Changes in version 1.0.4 (2024-07-26) - Post publication CRAN release. Changes in version 1.0.3 - Published in the Journal of Open Source Software. Changes in version 1.0.2 (2023-10-26) Bugfixes & changes - Rename the format argument of format() to prefix. Changes in version 1.0.1 (2023-08-22) Bugfixes & changes - plot() now supports missing values. Changes in version 1.0.0 (2023-06-13) - First release.