Date Time References

GDTL Index -- Gregorian Index -- Posix Time Index

The following are a number of references and sources of information about the date-time domain.

Date Calendar References

• ISO 8601 date time standard -- Summary by Markus Kuhn
• Calendrical Calculations book by Reingold & Dershowitz
• Calendar FAQ by Claus Tøndering [html][pdf]
• Calendar zone http://www.calendarzone.com/
• XML schema for date time
• Will Linden's Calendar Links
• XMAS calendar melt

Time

• Martin Folwer on time patterns
  • Recurring Events for Calendars
  • Patterns for things that Change with time

• US National Institute of Standards and Technology Time Exhibits
• Network Time Protocol at NTP.org
• US Navy Systems of Time
• International Atomic Time
• Date-Time type PostgreSQL User Guide

Other C/C++ Libraries

• ctime C Standard library reference at cplusplus.com
• XTime C extension proposal
• Another C library extension proposal by David Tribble
• libTAI is a C based time library
• Time Zone Database C library for managing timezones/places
• International Components for Unicode by IBM (open source)
  • Calendar Class
  • Date Time Services
  • Time Zone Class
  • Date-Time Formatting
  • Julian Library in C by Mark Showalter -- NASA

JAVA Date & Time Library Quick Reference

• Calendar class
• Gregorian calendar
• Date class
• sql.time class
• Date format symbols
• Date format
• Simple Date Format
• Simple Time Zone

Scripting Language Libraries

• A python date library MX Date Time
• Perl date-time
  • Date-Time packages at CPAN
  • Date::Calc at CPAN
  • Date::Convert calendar conversions at CPAN

Related Commercial and Fanciful Pages

• Leapsecond.com time page
• World Time Server / TZ database
• 10000 year clock at Long Now Foundation
• Timezones for PCs

Resolution, Precision, and Accuracy

• Definitions with pictures from Agilent Technologies
• Another set of pictures from Team Labs
• Definitions from Southampton Institute
• Definitions from Newport Corporation in the context of instrumentation