软件包：python3-dateutil（2.9.0-3）

powerful extensions to the standard Python 3 datetime module

It features:

 * computing of relative deltas (next month, next year, next monday, last week
   of month, etc);
 * computing of relative deltas between two given date and/or datetime objects
 * computing of dates based on very flexible recurrence rules, using a superset
   of the iCalendar specification. Parsing of RFC strings is supported as well.
 * generic parsing of dates in almost any string format
 * timezone (tzinfo) implementations for tzfile(5) format files
   (/etc/localtime, /usr/share/zoneinfo, etc), TZ environment string (in all
   known formats), iCalendar format files, given ranges (with help from
   relative deltas), local machine timezone, fixed offset timezone, UTC
   timezone
 * computing of Easter Sunday dates for any given year, using Western, Orthodox
   or Julian algorithms

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