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Asked: 2026-06-12T22:42:05+00:00

So, the setup is that I have the time, in seconds, since the epoch

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So, the setup is that I have the time, in seconds, since the epoch and I want to turn this into a date I can actually understand.
How do I do this in Haskell? If it is possible, how would I extract days/hours/minutes out of this new encoding?

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  1. Editorial Team

    Data.Time.Clock.POSIX has posixSecondsToUTCTime (you can convert another numeric type to the input expected POSIXTime with realToFrac).

    Data.Time.Calendar has a lot of the things you need to extract day, month, etc from the Day that forms a part of UTCTime, the rest of the package has other useful utilities.

    Example:

    Prelude> import Data.Time.Format.ISO8601
Prelude Data.Time.Format.ISO8601> import Data.Time.Clock.POSIX 
Prelude Data.Time.Format.ISO8601 Data.Time.Clock.POSIX> iso8601Show $ posixSecondsToUTCTime $ 100
"1970-01-01T00:01:40Z"
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