星穹列車使用的計時曆法，據說繼承自「開拓」星神阿基維利的家鄉，孤絕世界「裴迦納」。

開拓歷為紀年體系，一年被分為十二月，每月長度不等。據說在許多阿基維利曾行經的星球上，仍延續使用該套曆法。

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.