Rounding datetimes

round_date(datetime, unit = "hour")
## [1] "2024-03-08 20:00:00 UTC"
floor_date(datetime, unit = "hour")
## [1] "2024-03-08 19:00:00 UTC"
ceiling_date(datetime, unit = "hour")
## [1] "2024-03-08 20:00:00 UTC"