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InfinitePast

returns a DateObject expression representing infinite past in time.

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InfinitePast

InfinitePast

returns a DateObject expression representing infinite past in time.

Details

Examples

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Basic Examples  (2)

Represent the infinite past:

Wolfram Language code: InfinitePast

Use InfinitePast as a starting date for a DateInterval object:

Wolfram Language code: DateInterval[{InfinitePast, Today}]

Scope  (2)

DateList, AbsoluteTime and DateObject all accept infinite time specifications:

Wolfram Language code: DateList[InfinitePast]
Wolfram Language code: AbsoluteTime[InfinitePast]
Wolfram Language code: DateObject[InfinitePast]

DateInterval may use InfinitePast as a starting value for a time period:

Wolfram Language code: DateInterval[{InfinitePast, Now}]

All dates prior to the end date will be contained in the interval:

Wolfram Language code: DateWithinQ[%, Today - Quantity[100000, "Years"]]

Properties & Relations  (1)

Imposing "Eternity" granularity on a date before year 1 CE converts it into InfinitePast:

Wolfram Language code: DateObject[{-200, 1, 1}]
Wolfram Language code: DateObject[%, "Eternity"]
Wolfram Research (2020), InfinitePast, Wolfram Language function, https://reference.wolfram.com/language/ref/InfinitePast.html.

Text

Wolfram Research (2020), InfinitePast, Wolfram Language function, https://reference.wolfram.com/language/ref/InfinitePast.html.

CMS

Wolfram Language. 2020. "InfinitePast." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/InfinitePast.html.

APA

Wolfram Language. (2020). InfinitePast. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/InfinitePast.html

BibTeX

@misc{reference.wolfram_2026_infinitepast, author="Wolfram Research", title="{InfinitePast}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/InfinitePast.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_infinitepast, organization={Wolfram Research}, title={InfinitePast}, year={2020}, url={https://reference.wolfram.com/language/ref/InfinitePast.html}, note=[Accessed: 12-June-2026]}