you have one of two ways to go:
1) Use two separate database columns, one for date, one for time.
2) Use one date time column. The issue with using the date time column is that you need to process the date / time input in 2 ways:
a) Concatenate the two values into one,
b) convert them to the MySQL Date Time YYYY-MM-DD HH:MM:SS format
My recommendation is to use 2 separate columns.