dateutils man page
dateutils — command line date and time utilities
dateutils are a bunch of tools that revolve around fiddling with dates and times in the command line with a strong focus on use cases that arise when dealing with large amounts of financial data.
Add durations to dates or times
Convert dates between calendars or time zones
Compute durations between dates and times
Find date or time matches in input stream
Round dates or times to designated values
Generate sequences of dates or times
Compare dates or times
Command line version of the C function
Written by Sebastian Freundt <firstname.lastname@example.org>
Report bugs to: https://github.com/hroptatyr/dateutils/issues
The full documentation for dateutils is maintained as a Texinfo manual. If the info program is properly installed at your site, the command
should give you access to the complete manual.