Calculate a date before or after a chosen number of days, weeks, months, or years.

Calculate weekdays between dates and optionally exclude holidays.

Find years, months, days, total days, and weeks between dates.

Get the total days between two dates, with inclusive and exclusive counts.

Parse and create ISO 8601 date/time values.

Find hours, minutes, total minutes, and decimal hours between times.

Convert times between searchable IANA time zones.

Convert Unix seconds, milliseconds, ISO dates, UTC, and local time.

Convert UTC into local time with offsets and ISO output.

Calculate ISO week numbers and week-years.