I was given this formula to merge a date and a time column into one column. The time column did not have a space between the time and am/pm. The formula works perfectly. The formula is:=B8+REPLACE(C8,LEN(C8)-1,0," "). My question is: Why is it -1 instead of -2, As an example the time column contains 7:30am. I just want to understand how this works.