Generic classes for representation and manipulation of
dates, times and time zones without the need of timestamps,
which is a huge limitation for php programs. Includes time zone data,
time zone conversions and many date/time conversions.
It does not rely on 32-bit system date stamps, so
you can display calendars and compare dates that date
pre 1970 and post 2038. This package also provides a class
to convert date strings between Gregorian and Human calendar formats.