While the following shows what June 2024 should look like, the rendering of June 2024 as the start of a multi-month calendar (yearly calendar) is broken.
calendR(year = 2024, month = 6)
The rendering issue occurs when a full year, having 365 days, is plotted and the first month of the calendar, whatever it is, has six rows in its calendaring.
library(lubridate)
start <- "2024-06-01"
my_year <- int(start, start + years(1))
calendR(from = start, to = int_end(my_year))