Here is an example with made-up data
library(dplyr)
library(lubridate)
sample_df <- data.frame(
year = c(2020, 2020),
month = c(07, 08),
day = c(22, 23),
hour = c(10, 11),
minute = c(01, 02),
second = c(30, 32)
)
sample_df %>%
mutate(date = make_datetime(year, month, day, hour, minute, second))
#> year month day hour minute second date
#> 1 2020 7 22 10 1 30 2020-07-22 10:01:30
#> 2 2020 8 23 11 2 32 2020-08-23 11:02:32
Created on 2020-07-09 by the reprex package (v0.3.0)
If you need more specific help, please provide a proper REPRoducible EXample (reprex) illustrating your issue.