World Time Format

Official Date Specification

This document is the official explanation of how dates are represented in World Time Format.

Date Divisions

Days are grouped into larger units like so:

  • An alphabetic month has 26 days.
  • An alphabetic year has 26 alphabetic months.
  • An alphabetic century has 26 alphabetic years.
  • An alphabetic millenium has 26 alphabetic centuries.

Note that we skip the concepts of alphabetic weeks and alphabetic decades. Here's how the alphabetic date divisions compare with standard date divisions:

  • 1 alphabetic year = 676 days (very close to a Martian year)
  • 1 alphabetic century is about 48.1 years
  • 1 alphabetic millenium is about 1250.6 years

Date Format

Dates always end with a colon. Dates are always capitalized.

You can easily combine a date and a time by separating the parts with a colon (for example, FXR:DB, JU:ARR, K:M).

Some dates are ambiguous. For example, when a date with a single character is given (such as E:), the character is interpreted as an alphabetic day. There are many dates that end in E:, so E: is inherently ambiguous. The ambiguity is resolved by mixing in the missing parts from the current date. If today is RXK:, then E: refers to RXE:. If today is FJSML:, PA: refers to FJSPA:.

Date Synchronization

World Time Format dates are based on the astronomical Julian day. This is why the first hour, :A, starts at noon instead of midnight.