Origin is the date-time for 1970-01-01 UTC in POSIXct format. This date-time is the origin for the numbering system used by POSIXct, POSIXlt, chron, and Date classes.
origin
An object of class POSIXct
(inherits from POSIXt
) of length 1.
origin
#> [1] "1970-01-01 UTC"