I have a file with 15 columns, the first 5 are date and time columns `["year", "month", "day", "hour", "min"...]`, I want to combine the two time columns so that they are one column of time with format "H:M" so that it is easy for me to select data for a specific time range, e.g 19:00 - 24:00.

I have searched for a solution but all that shows up does not work and it's all on how to deal with date instead of time. 

Any help would be appreciated. Thank you.