现今银河普遍使用的计时历法，由星际和平公司制定并推行。琥珀纪以「存护」星神的推定诞生时为元纪，以克里珀每次挥锤敲击为新一纪的启始。
由于克里珀挥锤的间隔不定，每一琥珀纪的长度存在较大浮动。以开拓历换算，1琥珀纪约为76～240年不等。
星穹列车重新起航时值琥珀2157纪。
Amber Era (Calendar)
The calendar commonly used in the cosmos, created and promoted by the Interastral Peace Corporation. The Amber Era started at the estimated birth of Qlipoth as the Aeon of Preservation, and initiates a new Era every time Qlipoth swings their hammer during construction.
As Qlipoth swings their hammer at unpredictable intervals, the duration of every Amber Era varies significantly. The length of one Amber Era has been anywhere between 76 to 240 Trailblaze Years when converted.
The Astral Express restarted its journey on 2157 Amber Era (AE).
