Date & Time in excels

[Elijah1213]

How can I autofill the date & time, when I drop down the date (days) will only change like this (2023-04-21 08:00:00) (Row 1 = 2023-04-21 08:00:00 Row 2 = 2023-04-22 08:00:00 Row 3 = 2023-04-23 08:00:00)?

 

[Special-K99]

=ROW()+DATEVALUE("2023-04-20")+TIMEVALUE("08:00:00")

Format the cells as Custom yyyy-mm-dd hh:mm:ss