Date::Manip is often referred to as a large,
monolithic and impractical module. And at almost three times
the size of Date::Calc (which is itself referred
to as large and monolithic), it is certainly a large module.
However, it provides some useful high-level functions, including
very flexible parsing capabilities.
I have found Date::Manip to be useful primarily for its
date parsing capabilities. It can parse many different
human-readable date specifications. You can say things like:
ParseDate('today at midnight')
ParseDate('in 3 weeks')
ParseDate('1 year ago')
ParseDate('3rd monday in october')
ParseDate('3rd monday in october at 5 pm')
ParseDate('in 3 hours')
ParseDate('december 3, 1970')
and they will all parse correctly. Date::Manip
also handles concepts of work days and holidays, date deltas
(for example, "in 3 weeks" can be parsed both as a date and
as a delta), recurrent events, and named events. From its internal
representation, it can output dates in any format you may
The documentation is quite extensive and detailed, although
it is somewhat confusing in parts.
It is a very large module.
The Bottom Line
If you need powerful date parsing capabilities, or other
high-level functions (like recurrence, work/holiday days, etc.),
is for you. For most other things it
may be overkill.
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