星穹列车使用的计时历法，据说继承自「开拓」星神阿基维利的家乡，孤绝世界「裴迦纳」。

开拓历为纪年体系，一年被分为十二月，每月长度不等。据说在许多阿基维利曾行经的星球上，仍延续使用该套历法。

Trailblaze Calendar (Calendar)

The calendar used by the Astral Express. It is said to have come from the home planet of Akivili, the Aeon of Trailblaze — the isolated world of Pegana.

The Trailblaze calendar system has each year split into twelve months, and each month is of different length. Apparently this calendar is still used in many of the planets that Akivili had once passed in their travels.