Search range for date, then capture details

I've done similar to this before but it's been a while so I'm kind of rusty.

I need to search a range (B2:ZZ500) for a date between today and variable X (X will be taken from a userform).

For each date in the range after today but before X, I need it to do the following:

Capture the column header value (so row 1 of whatever column it found the date in) as variable colheader

Capture the row header value (column A of whatever row the date was found in) as variable rowheader

(So if a matching date was found in B63, it would store the value in B1 as colheader and the value in A63 as rowheader.

At this point another script will run that will populate a new worksheet with colheader and rowheader, and then move back to the original spreadsheet to search for the next date in the range meeting this criteria, and repeat the process until all applicable dates have been found (and captures into the new worksheet).

I do not need help populating the new worksheet, I have the code for that part, I just need the rest of the script I described.

Thanks!