turtledata$tracks$observation_start_time %>% wastdr::add_dates()
Error in UseMethod("mutate_") :
no applicable method for 'mutate_' applied to an object of class "c('POSIXct', 'POSIXt')"
Backtrace:
1. turtledata$tracks$observation_start_time
9. wastdr::add_dates(.)
11. dplyr::mutate(...)
20. dplyr::mutate_(.data, .dots = compat_as_lazy_dots(...))