time/p5-DateTime-Precise 1.05nb18 NetBSD

The purpose of this library was to replace our dependence on Unix epoch time, which, being limited to a range of about 1970 to 2030, is inadequate for our purposes (we have data as old as 1870). This date library effectively handles dates from A.D. 1000 to infinity, and would probably work all the way back to 0 (ignoring, of course, the switch-over to the Gregorian calendar). The useful features of Unix epoch time (ease of date difference calculation and date comparison, strict ordering) are preserved, and elements such as human-legibility are added. The library handles fractional seconds and some date/time manipulations used for the Global Positioning Satellite system.

The operators +/-, <=>, cmp, stringify are overloaded. Addition handles seconds and fractions of seconds, subtraction handles seconds or date differences, compares work, and stringification returns the a representation of the date.

The US Geological Survey (USGS) likes midnight to be 24:00:00 of the previous day, not 00:00:00 of the day people expect. If $DateTime::Precise::USGSMidnight is set, dprintf will always print midnight as 24:00:00 and the date returned from dprintf will have the previous day's date. Regardless, time is always stored internally as 00:00:00.