Trims the date range of a *pat* object to local time date boundaries which are *within* the range of data. This has the effect of removing partial-day data records at the start and end of the timeseries and is useful when calculating full-day statistics.
Day boundaries are calculated using the specified `timezone` or, if `NULL`, using `pat$meta$timezone`.
pat_trimDate(pat = NULL, timezone = NULL)A subset of the incoming *pat* time series object. (A list with `meta` and `data` dataframes.)