This should be self-evident. Here are all U.S. presidents who have completed their terms in office (i.e. excluding the current one).
A data frame with 45 observations on the following 3 variables.
the start date of the term, as a date
the end date of the term, as a date
I scraped this from https://www.presidentsusa.net/presvplist.html.
Data frame is capital-P "Presidents" to avoid a conflict with the
presidents data frame from the